Properties of the Number 4025

Four Thousand Twenty-Five

Basics

Value: 4024 → 4025 → 4026

Parity: odd

Prime: No

Previous Prime: 4021

Next Prime: 4027

Digit Sum: 11

Digital Root: 2

Palindrome: No

Factorization: 5 ² × 7 × 23

Divisors: 1, 5, 7, 23, 25, 35, 115, 161, 175, 575

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 111110111001

Octal: 7671

Duodecimal: 23B5

Hexadecimal: fb9

Square: 16200625

Square Root: 63.4428877022476

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

a(n) = a(n-1) + a(n-7), with a(i) = 1 for i = 0..6. A5709

Triangle of numbers related to triangle A092083; generalization of Stirling numbers of second kind A008277, Lah-numbers A008297, ... A92082

Generalized Stirling number triangle of first kind read by rows: T(n, k) = [x^k] ∏_m=1..n (x - m - r), with r = 1. A49444

a(0) = 0, a(1) = 1; a(n) = max { 4·a(k) + a(n-k) | 1 <= k <= n/2 }, for n > 1. A116520

a(n) = n*(n+2)*(n-2)/3. A77415

Total number of prime parts in all partitions of n. A37032

Unsigned 2-Stirling numbers of the first kind. A143491

Number A(n,k) of partitions of the (n+k)-multiset {1,2,...,n,1,2,...,k} into distinct multisets; square array A(n,k), n>=0, k>=0, read by antidiagonals. A346517

a(n) = A031287(n) + A031288(n) + A031289(n) + A031290(n) + A031291(n) + A031292(n) + A031293(n) + A031294(n) + A031295(n) + A031296(n). A193428

Triangle read by rows: coefficients of 1; 1(X+2); 1(X+2)(X+3); 1(X+2)(X+3)(X+4); .... A145324