172605042 has 24 divisors (see below), whose sum is σ = 386874540. Its totient is φ = 55550880.

The previous prime is 172605023. The next prime is 172605073. The reversal of 172605042 is 240506271.

172605042 is a `hidden beast` number, since 17 + 2 + 605 + 0 + 42 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 147112641 + 25492401 = 12129^2 + 5049^2 .

It is a junction number, because it is equal to n+sod(n) for n = 172604997 and 172605015.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 164809 + ... + 165852.

Almost surely, 2^172605042 is an apocalyptic number.

172605042 is an abundant number, since it is smaller than the sum of its proper divisors (214269498).

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

172605042 is a wasteful number, since it uses less digits than its factorization.

172605042 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 330698 (or 330695 counting only the distinct ones).

The product of its (nonzero) digits is 3360, while the sum is 27.

The square root of 172605042 is about 13137.9238085780. The cubic root of 172605042 is about 556.7811101709.

The spelling of 172605042 in words is "one hundred seventy-two million, six hundred five thousand, forty-two".