Properties of the Number 7945

Seven Thousand Nine Hundred Forty-Five

Basics

Value: 7944 → 7945 → 7946

Parity: odd

Prime: No

Previous Prime: 7937

Next Prime: 7949

Digit Sum: 25

Digital Root: 7

Palindrome: No

Factorization: 5 × 7 × 227

Divisors: 1, 5, 7, 35, 227, 1135, 1589, 7945

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 1111100001001

Octal: 17411

Duodecimal: 4721

Hexadecimal: 1f09

Square: 63123025

Square Root: 89.13472948295743

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

Numbers m such that the factorizations of m..m+3 have the same number of primes (including multiplicities). A45940

Positive integers whose square is the sum of 50 consecutive squares. A257781

Number T(n, k) of ways to place k points on an n X n X n triangular grid so that no pair of them has distance sqrt(3). Triangle read by rows. A244500

T(n,k)=Number of nXk 0..3 arrays with values 0..3 introduced in row major order, the number of instances of each value within one of each other, and every element equal to zero or one horizontal or vertical neighbors. A199356

Sum of all the parts in the partitions of n into 6 squarefree parts. A308903

Non-balanced numbers in A015765. A74868

Integers k such that there exists an integer 0<m<k such that σ(m)² + σ(k)² = (m+k)². A383484

a(n) = n*(n-1)*(n² + 2)/6. A71244

Numbers n such that n, n+1, n+2 and n+3 are products of exactly 3 primes. A124057

Products of 3 distinct safe primes. A157354