165125903 has 8 divisors (see below), whose sum is σ = 174036720. Its totient is φ = 156237120.

The previous prime is 165125881. The next prime is 165125921. The reversal of 165125903 is 309521561.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 165125903 - 2⁶ = 165125839 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 165125903.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (165124903) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11213 + ... + 21353.

It is an arithmetic number, because the mean of its divisors is an integer number (21754590).

Almost surely, 2^165125903 is an apocalyptic number.

165125903 is a deficient number, since it is larger than the sum of its proper divisors (8910817).

165125903 is a wasteful number, since it uses less digits than its factorization.

165125903 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11017.

The product of its (nonzero) digits is 8100, while the sum is 32.

The square root of 165125903 is about 12850.1324117691. The cubic root of 165125903 is about 548.6201255527.

The spelling of 165125903 in words is "one hundred sixty-five million, one hundred twenty-five thousand, nine hundred three".