165057405 has 16 divisors (see below), whose sum is σ = 266431680. Its totient is φ = 87250688.

The previous prime is 165057401. The next prime is 165057413. The reversal of 165057405 is 504750561.

It is a cyclic number.

It is not a de Polignac number, because 165057405 - 2² = 165057401 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (165057401) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 46995 + ... + 50384.

It is an arithmetic number, because the mean of its divisors is an integer number (16651980).

Almost surely, 2^165057405 is an apocalyptic number.

165057405 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

165057405 is a deficient number, since it is larger than the sum of its proper divisors (101374275).

165057405 is a wasteful number, since it uses less digits than its factorization.

165057405 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 97500.

The product of its (nonzero) digits is 21000, while the sum is 33.

The square root of 165057405 is about 12847.4668709439. The cubic root of 165057405 is about 548.5442550036.

The spelling of 165057405 in words is "one hundred sixty-five million, fifty-seven thousand, four hundred five".