Properties of the Number 11945

Eleven Thousand Nine Hundred Forty-Five

Basics

Value: 11944 → 11945 → 11946

Parity: odd

Prime: No

Previous Prime: 11941

Next Prime: 11953

Digit Sum: 20

Digital Root: 2

Palindrome: No

Factorization: 5 × 2389

Divisors: 1, 5, 2389, 11945

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 10111010101001

Octal: 27251

Duodecimal: 6AB5

Hexadecimal: 2ea9

Square: 142683025

Square Root: 109.29318368498559

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 crossings in a regular drawing of the complete bipartite graph K(n,n). A159065

Positive numbers whose product of digits is 9 times their sum. A62041

Number of necklaces with n beads over an n-ary alphabet {a1,a2,...,an} such that #(w,a1) >= #(w,a2) >= ... >= #(w,ak) >= 0, where #(w,x) counts the letters·in word w. A72605

Expansion of x/((1-x-x³)*(1-x)⁶). A144900

The number of partitions of n which represent Chomp positions with Sprague-Grundy value 6. A284693

a(n) = gcd(a(n-1),n-1)*a(n-1) + d(n-1) if a(n-1) is not divisible by 2, otherwise a(n) = a(n-1)/2, where gcd denotes common divisor, d(n) is number of divisors of n. A133904

Sum of even products minus sum of odd products of different pairs of numbers from 1 to n. A134449

Number of decompositions of highly composite numbers (A002182) into unordered sums of two primes. A228943

Numbers n such that n!!! - 3⁴ is prime. A247464

Partial sums of the number of active (ON, black) cells in n-th stage of growth of two-dimensional cellular automaton defined by "Rule 453", based on the 5-celled von Neumann neighborhood. A272275