165765252 has 12 divisors (see below), whose sum is σ = 386785616. Its totient is φ = 55255080.

The previous prime is 165765251. The next prime is 165765289. The reversal of 165765252 is 252567561.

It is a tau number, because it is divible by the number of its divisors (12).

It is a self number, because there is not a number n which added to its sum of digits gives 165765252.

It is not an unprimeable number, because it can be changed into a prime (165765251) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6906874 + ... + 6906897.

Almost surely, 2^165765252 is an apocalyptic number.

165765252 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

165765252 is an abundant number, since it is smaller than the sum of its proper divisors (221020364).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

165765252 is a wasteful number, since it uses less digits than its factorization.

165765252 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13813778 (or 13813776 counting only the distinct ones).

The product of its digits is 126000, while the sum is 39.

The square root of 165765252 is about 12874.9855145550. The cubic root of 165765252 is about 549.3272788880.

The spelling of 165765252 in words is "one hundred sixty-five million, seven hundred sixty-five thousand, two hundred fifty-two".