Properties of the Number 21374

Twenty-One Thousand Three Hundred Seventy-Four

Basics

Value: 21373 → 21374 → 21375

Parity: even

Prime: No

Previous Prime: 21347

Next Prime: 21377

Digit Sum: 17

Digital Root: 8

Palindrome: No

Factorization: 2 × 10687

Divisors: 1, 2, 10687, 21374

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 101001101111110

Octal: 51576

Duodecimal: 10452

Hexadecimal: 537e

Square: 456847876

Square Root: 146.1984952042941

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 irreducible positions of size n in Montreal solitaire. A7049

Number of points in N⁶ of norm <= n. A55405

a(n) is the number of multisets of n positive decimal digits where the sum of the digits equals the product of the prime digits. A384505

Number of points in Nⁿ of norm <= 7. A55422

Expansion of ∑_k>=1 x^k*(1 + x^k)/(1 - x^k)⁴. A320941

G.f.: A(x) = 1/[1-x - ∑_n>=1 A001147(n)*x²ⁿ ] where A001147(n) = (2n)!/(n!*2ⁿ) is the double factorials. A124495

Numbers k such that k and 4k, taken together, contain all digits 1 though 9 at least once. A346135

Irregular table read by rows: T(n,k) is the number of k-gons, k>=2, in the Farey Ring graph FR(n) defined in A359116. A359119

Expansion of 1/((1-x)*(1-3·x)*(1-4·x)*(1-8·x)). A21374

Primes for which -15 is a primitive root. A105887