Properties of the Number 1325

One Thousand Three Hundred Twenty-Five

Basics

Value: 1324 → 1325 → 1326

Parity: odd

Prime: No

Previous Prime: 1321

Next Prime: 1327

Digit Sum: 11

Digital Root: 2

Palindrome: No

Factorization: 5 ² × 53

Divisors: 1, 5, 25, 53, 265, 1325

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

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Representations

Binary: 10100101101

Octal: 2455

Duodecimal: 925

Hexadecimal: 52d

Square: 1755625

Square Root: 36.40054944640259

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) = n*(n+3)/2. A96

Odd numbers of the form p^1+4k * r², where p is prime of the form 1+4m, r > 1, and gcd(p,r) = 1. (Euler's criteria for odd perfect numbers). A228058

Centered tetrahedral numbers. A5894

Markoff (or Markov) numbers: union of positive integers x, y, z satisfying x² + y² + z² = 3·x*y·z. A2559

a(n) = n*(2·n + 3). A14106

a(n) = (n+1)*(2-n)/2. A80956

Number of integer partitions of n without any three parts (a,b,c) (repeats allowed) satisfying a + b = c. A variation of sum-free partitions. A364345

Number of integer partitions of n with unimodal run-lengths. A332280

Number of integer partitions of n such that every set of distinct parts has a different sum. A325862

Number of nonempty subsets of {1..n} whose geometric mean is an integer. A326027