143,515

5 × 28703

Starting at 143,515, the Collatz iteration reaches 1 after 157 steps. The first transition is 430546; the starting value is odd with 4 positive divisors.

Prime Factor Structure

Factorization String 5 × 28703

Distinct Prime Factors 2

Square Status No

Abundance Measure Deficient

Analytical Properties

Total Divisors 4

Divisor Sum (σ) 172,224

Proper Divisor Sum 28,709

Digit Sum / Digital Root 19 (Root: 1)

Adjacent Primes #143513 ← → #143519

Radix Representation

Decimal	143515
Binary	100011000010011011 (18 bits)
Octal	0o430233
Hexadecimal	0x2309B

Divisor Catalog (4)

1 5 28,703 143,515

Collatz Trajectory (157 steps to reach 1)

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

143,515 430,546 215,273 645,820 322,910 161,455 484,366 242,183 726,550 363,275 1,089,826 544,913 1,634,740 817,370 408,685 1,226,056 613,028 306,514 153,257 459,772 229,886 114,943 344,830 172,415 517,246 258,623 775,870 387,935 1,163,806 581,903 1,745,710 872,855 2,618,566 1,309,283 3,927,850 1,963,925 5,891,776 2,945,888 1,472,944 736,472 368,236 184,118 92,059 276,178 138,089 414,268 207,134 103,567 310,702 155,351 466,054 233,027 699,082 349,541 1,048,624 524,312 262,156 131,078 65,539 196,618

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