15825 has 12 divisors (see below), whose sum is σ = 26288. Its totient is φ = 8400.

The previous prime is 15823. The next prime is 15859. The reversal of 15825 is 52851.

15825 is nontrivially palindromic in base 14.

It is not a de Polignac number, because 15825 - 2¹ = 15823 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (15823) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 31 + ... + 180.

2¹⁵⁸²⁵ is an apocalyptic number.

15825 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

15825 is a deficient number, since it is larger than the sum of its proper divisors (10463).

15825 is a wasteful number, since it uses less digits than its factorization.

15825 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 224 (or 219 counting only the distinct ones).

The product of its digits is 400, while the sum is 21.

The square root of 15825 is about 125.7974562541. The cubic root of 15825 is about 25.1062147645.

The spelling of 15825 in words is "fifteen thousand, eight hundred twenty-five".