Properties of the Number 1555

One Thousand Five Hundred Fifty-Five

Basics

Value: 1554 → 1555 → 1556

Parity: odd

Prime: No

Previous Prime: 1553

Next Prime: 1559

Digit Sum: 16

Digital Root: 7

Palindrome: No

Factorization: 5 × 311

Divisors: 1, 5, 311, 1555

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

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Representations

Binary: 11000010011

Octal: 3023

Duodecimal: A97

Hexadecimal: 613

Square: 2418025

Square Root: 39.433488306260706

Classification

Fibonacci: No

Bell Number: No

Factorial Number: No

Regular Number: No

Perfect Number: No

Special

Kaprekar Constant: No

Munchausen Constant: No

Armstrong Number: No

Kaprekar Number: No

Catalan Number: No

Vampire Number: No

Taxicab Number: No

Super Prime: No

Friedman Number: No

Fermat Number: No

Cullen Number: No

OEIS Sequences

Number of compositions (ordered partitions) of n into distinct parts. A32020

a(n) = (6ⁿ - 1)/5. A3464

a(n) = least k such that the remainder when 5^k is divided by k is n. A119679

Discriminants of imaginary quadratic fields with class number 4 (negated). A13658

Numbers k such that k² divides 6^k-1. A127106

Number of partitions of n that do not contain 2 as a part. A27336

Numbers m such that the Bernoulli number B_2·m has denominator 66. A51229

a(n) = n⁴ + n³ + n² + n + 1. A53699

Triangle T(n, k, m) = (m*(n-k) + 1)*T(n-1, k-1, m) + (m·k + 1)*T(n-1, k, m) - m·k*(n-k)*T(n-2, k-1, m) with T(n, 0, m) = T(n, n, m) = 1 and m = 5, read by rows. A157156

Numbers k such that 2^k + 11 is prime. A102633