172494905 has 32 divisors (see below), whose sum is σ = 230947200. Its totient is φ = 122636800.

The previous prime is 172494899. The next prime is 172494911. The reversal of 172494905 is 509494271.

It is an interprime number because it is at equal distance from previous prime (172494899) and next prime (172494911).

It is a de Polignac number, because none of the positive numbers 2^k-172494905 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 641111 + ... + 641379.

It is an arithmetic number, because the mean of its divisors is an integer number (7217100).

Almost surely, 2^172494905 is an apocalyptic number.

It is an amenable number.

172494905 is a deficient number, since it is larger than the sum of its proper divisors (58452295).

172494905 is a wasteful number, since it uses less digits than its factorization.

172494905 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 505.

The product of its (nonzero) digits is 90720, while the sum is 41.

The square root of 172494905 is about 13133.7315717963. The cubic root of 172494905 is about 556.6626600801.

The spelling of 172494905 in words is "one hundred seventy-two million, four hundred ninety-four thousand, nine hundred five".