1,520,615

5 × 29 × 10487

Starting at 1,520,615, the Collatz iteration reaches 1 after 106 steps. The first transition is 4561846; the starting value is odd with 8 positive divisors.

Prime Factor Structure

Factorization String 5 × 29 × 10487

Distinct Prime Factors 3

Square Status No

Abundance Measure Deficient

Analytical Properties

Total Divisors 8

Divisor Sum (σ) 1,887,840

Proper Divisor Sum 367,225

Digit Sum / Digital Root 20 (Root: 2)

Adjacent Primes #1520611 ← → #1520621

Radix Representation

Decimal	1520615
Binary	101110011001111100111 (21 bits)
Octal	0o5631747
Hexadecimal	0x1733E7

Divisor Catalog (8)

1 5 29 145 10,487 52,435 304,123 1,520,615

Collatz Trajectory (106 steps to reach 1)

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

1,520,615 4,561,846 2,280,923 6,842,770 3,421,385 10,264,156 5,132,078 2,566,039 7,698,118 3,849,059 11,547,178 5,773,589 17,320,768 8,660,384 4,330,192 2,165,096 1,082,548 541,274 270,637 811,912 405,956 202,978 101,489 304,468 152,234 76,117 228,352 114,176 57,088 28,544 14,272 7,136 3,568 1,784 892 446 223 670 335 1,006 503 1,510 755 2,266 1,133 3,400 1,700 850 425 1,276 638 319 958 479 1,438 719 2,158 1,079 3,238 1,619

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