165742925 has 24 divisors (see below), whose sum is σ = 212638176. Its totient is φ = 128082240.

The previous prime is 165742883. The next prime is 165742937. The reversal of 165742925 is 529247561.

It is not a de Polignac number, because 165742925 - 2⁶ = 165742861 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 87842 + ... + 89708.

It is an arithmetic number, because the mean of its divisors is an integer number (8859924).

Almost surely, 2^165742925 is an apocalyptic number.

It is an amenable number.

165742925 is a deficient number, since it is larger than the sum of its proper divisors (46895251).

165742925 is a wasteful number, since it uses less digits than its factorization.

165742925 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1997 (or 1992 counting only the distinct ones).

The product of its digits is 151200, while the sum is 41.

The square root of 165742925 is about 12874.1184164198. The cubic root of 165742925 is about 549.3026147305.

The spelling of 165742925 in words is "one hundred sixty-five million, seven hundred forty-two thousand, nine hundred twenty-five".