172121752 has 32 divisors (see below), whose sum is σ = 352633680. Its totient is φ = 78111360.

The previous prime is 172121749. The next prime is 172121767. The reversal of 172121752 is 257121271.

It is a self number, because there is not a number n which added to its sum of digits gives 172121752.

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, 73918 + ... + 76210.

Almost surely, 2^172121752 is an apocalyptic number.

It is an amenable number.

172121752 is an abundant number, since it is smaller than the sum of its proper divisors (180511928).

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

172121752 is a wasteful number, since it uses less digits than its factorization.

172121752 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3163 (or 3159 counting only the distinct ones).

The product of its digits is 1960, while the sum is 28.

The square root of 172121752 is about 13119.5179789503. The cubic root of 172121752 is about 556.2609664631.

The spelling of 172121752 in words is "one hundred seventy-two million, one hundred twenty-one thousand, seven hundred fifty-two".