165604125 has 32 divisors (see below), whose sum is σ = 282312576. Its totient is φ = 86160000.

The previous prime is 165604111. The next prime is 165604141. The reversal of 165604125 is 521406561.

It is not a de Polignac number, because 165604125 - 2¹⁶ = 165538589 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 165604092 and 165604101.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 9990 + ... + 20760.

It is an arithmetic number, because the mean of its divisors is an integer number (8822268).

Almost surely, 2^165604125 is an apocalyptic number.

165604125 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

165604125 is a deficient number, since it is larger than the sum of its proper divisors (116708451).

165604125 is a wasteful number, since it uses less digits than its factorization.

165604125 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10830 (or 10820 counting only the distinct ones).

The product of its (nonzero) digits is 7200, while the sum is 30.

The square root of 165604125 is about 12868.7266269822. The cubic root of 165604125 is about 549.1492356428.

The spelling of 165604125 in words is "one hundred sixty-five million, six hundred four thousand, one hundred twenty-five".