1,720,271

7 × 245753

Starting at 1,720,271, the Collatz iteration reaches 1 after 189 steps. The first transition is 5160814; the starting value is odd with 4 positive divisors.

Prime Factor Structure

Factorization String 7 × 245753

Distinct Prime Factors 2

Square Status No

Abundance Measure Deficient

Analytical Properties

Total Divisors 4

Divisor Sum (σ) 1,966,032

Proper Divisor Sum 245,761

Digit Sum / Digital Root 20 (Root: 2)

Adjacent Primes #1720231 ← → #1720273

Radix Representation

Decimal	1720271
Binary	110100011111111001111 (21 bits)
Octal	0o6437717
Hexadecimal	0x1A3FCF

Divisor Catalog (4)

1 7 245,753 1,720,271

Collatz Trajectory (189 steps to reach 1)

Iterative sequence n → n/2 (if even) or 3n+1 (if odd):

1,720,271 5,160,814 2,580,407 7,741,222 3,870,611 11,611,834 5,805,917 17,417,752 8,708,876 4,354,438 2,177,219 6,531,658 3,265,829 9,797,488 4,898,744 2,449,372 1,224,686 612,343 1,837,030 918,515 2,755,546 1,377,773 4,133,320 2,066,660 1,033,330 516,665 1,549,996 774,998 387,499 1,162,498 581,249 1,743,748 871,874 435,937 1,307,812 653,906 326,953 980,860 490,430 245,215 735,646 367,823 1,103,470 551,735 1,655,206 827,603 2,482,810 1,241,405 3,724,216 1,862,108 931,054 465,527 1,396,582 698,291 2,094,874 1,047,437 3,142,312 1,571,156 785,578 392,789

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