172428751 has 12 divisors (see below), whose sum is σ = 196068600. Its totient is φ = 151345040.

The previous prime is 172428733. The next prime is 172428757. The reversal of 172428751 is 157824271.

It is not a de Polignac number, because 172428751 - 2⁵ = 172428719 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 172428751.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (172428757) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 21061 + ... + 28078.

It is an arithmetic number, because the mean of its divisors is an integer number (16339050).

Almost surely, 2^172428751 is an apocalyptic number.

172428751 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

172428751 is a deficient number, since it is larger than the sum of its proper divisors (23639849).

172428751 is a wasteful number, since it uses less digits than its factorization.

172428751 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49190 (or 49179 counting only the distinct ones).

The product of its digits is 31360, while the sum is 37.

The square root of 172428751 is about 13131.2128533506. The cubic root of 172428751 is about 556.5914885667.

The spelling of 172428751 in words is "one hundred seventy-two million, four hundred twenty-eight thousand, seven hundred fifty-one".