165413265 has 16 divisors (see below), whose sum is σ = 269656128. Its totient is φ = 86555456.

The previous prime is 165413249. The next prime is 165413279. The reversal of 165413265 is 562314561.

It is a cyclic number.

It is not a de Polignac number, because 165413265 - 2⁴ = 165413249 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 103239 + ... + 104828.

It is an arithmetic number, because the mean of its divisors is an integer number (16853508).

Almost surely, 2^165413265 is an apocalyptic number.

165413265 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

165413265 is a deficient number, since it is larger than the sum of its proper divisors (104242863).

165413265 is a wasteful number, since it uses less digits than its factorization.

165413265 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 208128.

The product of its digits is 21600, while the sum is 33.

The square root of 165413265 is about 12861.3088369730. The cubic root of 165413265 is about 548.9381883356.

The spelling of 165413265 in words is "one hundred sixty-five million, four hundred thirteen thousand, two hundred sixty-five".