15604 has 12 divisors (see below), whose sum is σ = 28224. Its totient is φ = 7544.

The previous prime is 15601. The next prime is 15607. The reversal of 15604 is 40651.

It is an interprime number because it is at equal distance from previous prime (15601) and next prime (15607).

It is a plaindrome in base 9.

It is a nialpdrome in base 7.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (15601) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 147 + ... + 229.

It is an arithmetic number, because the mean of its divisors is an integer number (2352).

2¹⁵⁶⁰⁴ is an apocalyptic number.

It is an amenable number.

15604 is a deficient number, since it is larger than the sum of its proper divisors (12620).

15604 is a wasteful number, since it uses less digits than its factorization.

15604 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 134 (or 132 counting only the distinct ones).

The product of its (nonzero) digits is 120, while the sum is 16.

The square root of 15604 is about 124.9159717570. The cubic root of 15604 is about 24.9887949787.

The spelling of 15604 in words is "fifteen thousand, six hundred four".