172512432 has 60 divisors (see below), whose sum is σ = 489438664. Its totient is φ = 56712960.

The previous prime is 172512409. The next prime is 172512433. The reversal of 172512432 is 234215271.

It is a junction number, because it is equal to n+sod(n) for n = 172512396 and 172512405.

It is not an unprimeable number, because it can be changed into a prime (172512433) 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, 2307 + ... + 18717.

Almost surely, 2^172512432 is an apocalyptic number.

172512432 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 172512432, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (244719332).

172512432 is an abundant number, since it is smaller than the sum of its proper divisors (316926232).

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

172512432 is a wasteful number, since it uses less digits than its factorization.

172512432 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16498 (or 16489 counting only the distinct ones).

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

The square root of 172512432 is about 13134.3988061883. The cubic root of 172512432 is about 556.6815133829.

It can be divided in two parts, 17251 and 2432, that added together give a 9-th power (19683 = 3⁹).

The spelling of 172512432 in words is "one hundred seventy-two million, five hundred twelve thousand, four hundred thirty-two".