Properties of the Number 40401

Forty Thousand Four Hundred One

Basics

Value: 40400 → 40401 → 40402

Parity: odd

Prime: No

Previous Prime: 40387

Next Prime: 40423

Digit Sum: 9

Digital Root: 9

Palindrome: No

Factorization: 3 ² × 67 ²

Divisors: 1, 3, 9, 67, 201, 603, 4489, 13467, 40401

Polygonal

Triangular: No

Square: Yes

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

4823 Try Today's Challenge

Representations

Binary: 1001110111010001

Octal: 116721

Duodecimal: 1B469

Hexadecimal: 9dd1

Square: 1632240801

Square Root: 201

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) = (6·n+3)². A16946

Odd refactorable numbers. A36896

a(n) = (10·n + 1)². A17282

Non-palindromic squares which when written backwards remain square (and still have the same number of digits). A35090

Squares that become prime when their most significant (or leftmost) digit is removed. A225873

a(n) = (8·n + 1)². A17078

Squares with initial digit '4'. A45787

Squares whose reversal is also a square. A61457

Squares whose digits are squares. A19544

T(n,k)=Number of (n+1)X(k+1) 0..3 arrays with rows and columns in nondecreasing order and with no 2X2 subblock sum differing from a horizontal or vertical neighbor subblock sum by more than one. A184095