Properties of the Number 12990

Twelve Thousand Nine Hundred Ninety

Basics

Value: 12989 → 12990 → 12991

Parity: even

Prime: No

Previous Prime: 12983

Next Prime: 13001

Digit Sum: 21

Digital Root: 3

Palindrome: No

Factorization: 2 × 3 × 5 × 433

Divisors: 1, 2, 3, 5, 6, 10, 15, 30, 433, 866

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

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Representations

Binary: 11001010111110

Octal: 31276

Duodecimal: 7626

Hexadecimal: 32be

Square: 168740100

Square Root: 113.97368117245314

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 ways to split a strict integer partition of n into consecutive subsequences of equal length. A323434

Expansion of ∏_m>=1 1/(1 + m·q^m)⁵. A22697

Integers expressible as the sum of (at least two) consecutive primes in at least 4 ways. A67374

Number of base 10 n-digit numbers with adjacent digits differing by three or less. A126478

a(n) = n*(14·n + 13). A195028

Numbers k such that A003132(k²) = A003132(k), where A003132(n) is the sum of the squares of the digits of n. A309883

E.g.f. A(x) satisfies A(x) = 1 + x²*exp(x)*A(x)³. A390647

a(n) = 36·n² - 6. A158462

Number of nX1 binary arrays with the number of 0-1 adjacencies equal to the number of 0-0 adjacencies. A183256

Numbers that are the sum of 10 consecutive primes and also the sum of 10 consecutive semiprimes. A284102