172126972 has 24 divisors (see below), whose sum is σ = 325733184. Its totient is φ = 79276032.

The previous prime is 172126961. The next prime is 172126991. The reversal of 172126972 is 279621271.

172126972 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 23733 + ... + 30124.

It is an arithmetic number, because the mean of its divisors is an integer number (13572216).

Almost surely, 2^172126972 is an apocalyptic number.

It is an amenable number.

172126972 is a deficient number, since it is larger than the sum of its proper divisors (153606212).

172126972 is a wasteful number, since it uses less digits than its factorization.

172126972 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 53925 (or 53923 counting only the distinct ones).

The product of its digits is 21168, while the sum is 37.

The square root of 172126972 is about 13119.7169176778. The cubic root of 172126972 is about 556.2665897169.

The spelling of 172126972 in words is "one hundred seventy-two million, one hundred twenty-six thousand, nine hundred seventy-two".