165025257 has 8 divisors (see below), whose sum is σ = 220094784. Its totient is φ = 109986288.

The previous prime is 165025249. The next prime is 165025277. The reversal of 165025257 is 752520561.

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

It is not a de Polignac number, because 165025257 - 2³ = 165025249 is a prime.

It is not an unprimeable number, because it can be changed into a prime (165025247) 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, 12708 + ... + 22170.

It is an arithmetic number, because the mean of its divisors is an integer number (27511848).

Almost surely, 2^165025257 is an apocalyptic number.

It is an amenable number.

165025257 is a deficient number, since it is larger than the sum of its proper divisors (55069527).

165025257 is an equidigital number, since it uses as much as digits as its factorization.

165025257 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15279.

The product of its (nonzero) digits is 21000, while the sum is 33.

The square root of 165025257 is about 12846.2156684371. The cubic root of 165025257 is about 548.5086396253.

The spelling of 165025257 in words is "one hundred sixty-five million, twenty-five thousand, two hundred fifty-seven".