165122405 has 24 divisors (see below), whose sum is σ = 240527232. Its totient is φ = 108300192.

The previous prime is 165122393. The next prime is 165122413. The reversal of 165122405 is 504221561.

165122405 = 986² + 987² + ... + 1132².

It is not a de Polignac number, because 165122405 - 2⁴ = 165122389 is a prime.

It is a Duffinian number.

It is a congruent number.

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, 9017 + ... + 20286.

It is an arithmetic number, because the mean of its divisors is an integer number (10021968).

Almost surely, 2^165122405 is an apocalyptic number.

It is an amenable number.

165122405 is a deficient number, since it is larger than the sum of its proper divisors (75404827).

165122405 is a wasteful number, since it uses less digits than its factorization.

165122405 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29345 (or 29338 counting only the distinct ones).

The product of its (nonzero) digits is 2400, while the sum is 26.

The square root of 165122405 is about 12849.9963035014. The cubic root of 165122405 is about 548.6162515658.

Adding to 165122405 its reverse (504221561), we get a palindrome (669343966).

The spelling of 165122405 in words is "one hundred sixty-five million, one hundred twenty-two thousand, four hundred five".