165129265 has 24 divisors (see below), whose sum is σ = 233127720. Its totient is φ = 111944448.

The previous prime is 165129253. The next prime is 165129287. The reversal of 165129265 is 562921561.

It can be written as a sum of positive squares in 4 ways, for example, as 41563809 + 123565456 = 6447^2 + 11116^2 .

It is not a de Polignac number, because 165129265 - 2⁷ = 165129137 is a prime.

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, 18019 + ... + 25591.

It is an arithmetic number, because the mean of its divisors is an integer number (9713655).

Almost surely, 2^165129265 is an apocalyptic number.

It is an amenable number.

165129265 is a deficient number, since it is larger than the sum of its proper divisors (67998455).

165129265 is an equidigital number, since it uses as much as digits as its factorization.

165129265 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7681 (or 7674 counting only the distinct ones).

The product of its digits is 32400, while the sum is 37.

The square root of 165129265 is about 12850.2632268759. The cubic root of 165129265 is about 548.6238488699.

The spelling of 165129265 in words is "one hundred sixty-five million, one hundred twenty-nine thousand, two hundred sixty-five".