Properties of the Number 2604

Two Thousand Six Hundred Four

Basics

Value: 2603 → 2604 → 2605

Parity: even

Prime: No

Previous Prime: 2593

Next Prime: 2609

Digit Sum: 12

Digital Root: 3

Palindrome: No

Factorization: 2 ² × 3 × 7 × 31

Divisors: 1, 2, 3, 4, 6, 7, 12, 14, 21, 28

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 101000101100

Octal: 5054

Duodecimal: 1610

Hexadecimal: a2c

Square: 6780816

Square Root: 51.02940328869229

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 stacks, or planar partitions of n; also number of weakly unimodal compositions of n. A1523

Number of (w,x,y) such that w,x,y are all in {0,...,n} and |w-x| = |x-y|. A212959

Sums of twin prime pairs. A54735

Linear 2nd order recurrence: a(n) = 4·a(n-1) + 5·a(n-2). A15531

Numbers k such that k² divides 5^k-1. A127105

Number of orderless same-trees of weight n. A289078

Four times pentagonal numbers: a(n) = 2·n*(3·n-1). A33579

a(n) = ∑_{d∣n, n/d == 1 (mod 4)} d² - ∑_{d∣n, n/d == 3 (mod 4)} d². A50470

Numbers m such that 6·m+1 is a perfect square. A62717

a(n) = n*(9·n + 1)/2. A22267