165406146 has 32 divisors (see below), whose sum is σ = 339958080. Its totient is φ = 53630976.

The previous prime is 165406127. The next prime is 165406181. The reversal of 165406146 is 641604561.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 31930 + ... + 36746.

It is an arithmetic number, because the mean of its divisors is an integer number (10623690).

Almost surely, 2^165406146 is an apocalyptic number.

165406146 is an abundant number, since it is smaller than the sum of its proper divisors (174551934).

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

165406146 is a wasteful number, since it uses less digits than its factorization.

165406146 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4978.

The product of its (nonzero) digits is 17280, while the sum is 33.

The square root of 165406146 is about 12861.0320736712. The cubic root of 165406146 is about 548.9303132174.

The spelling of 165406146 in words is "one hundred sixty-five million, four hundred six thousand, one hundred forty-six".