405255172 has 24 divisors (see below), whose sum is σ = 825806016. Its totient is φ = 170403168.

The previous prime is 405255167. The next prime is 405255173. The reversal of 405255172 is 271552504.

It is not an unprimeable number, because it can be changed into a prime (405255173) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 135058 + ... + 138025.

It is an arithmetic number, because the mean of its divisors is an integer number (34408584).

Almost surely, 2^405255172 is an apocalyptic number.

It is an amenable number.

405255172 is an abundant number, since it is smaller than the sum of its proper divisors (420550844).

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

405255172 is a wasteful number, since it uses less digits than its factorization.

405255172 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 273147 (or 273145 counting only the distinct ones).

The product of its (nonzero) digits is 14000, while the sum is 31.

The square root of 405255172 is about 20130.9505985187. The cubic root of 405255172 is about 740.0189744343.

The spelling of 405255172 in words is "four hundred five million, two hundred fifty-five thousand, one hundred seventy-two".