1,557,542

2 × 7 × 111253

Starting at 1,557,542, the Collatz iteration reaches 1 after 155 steps. The first transition is 778771; the starting value is even with 8 positive divisors.

Prime Factor Structure

Factorization String 2 × 7 × 111253

Distinct Prime Factors 3

Square Status No

Abundance Measure Deficient

Analytical Properties

Total Divisors 8

Divisor Sum (σ) 2,670,096

Proper Divisor Sum 1,112,554

Digit Sum / Digital Root 29 (Root: 2)

Adjacent Primes #1557509 ← → #1557547

Radix Representation

Decimal	1557542
Binary	101111100010000100110 (21 bits)
Octal	0o5742046
Hexadecimal	0x17C426

Divisor Catalog (8)

1 2 7 14 111,253 222,506 778,771 1,557,542

Collatz Trajectory (155 steps to reach 1)

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

1,557,542 778,771 2,336,314 1,168,157 3,504,472 1,752,236 876,118 438,059 1,314,178 657,089 1,971,268 985,634 492,817 1,478,452 739,226 369,613 1,108,840 554,420 277,210 138,605 415,816 207,908 103,954 51,977 155,932 77,966 38,983 116,950 58,475 175,426 87,713 263,140 131,570 65,785 197,356 98,678 49,339 148,018 74,009 222,028 111,014 55,507 166,522 83,261 249,784 124,892 62,446 31,223 93,670 46,835 140,506 70,253 210,760 105,380 52,690 26,345 79,036 39,518 19,759 59,278

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