123172432 has 10 divisors (see below), whose sum is σ = 238646618. Its totient is φ = 61586208.

The previous prime is 123172409. The next prime is 123172451. The reversal of 123172432 is 234271321.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 82519056 + 40653376 = 9084^2 + 6376^2 .

It is a junction number, because it is equal to n+sod(n) for n = 123172397 and 123172406.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3849123 + ... + 3849154.

Almost surely, 2^123172432 is an apocalyptic number.

It is an amenable number.

123172432 is a deficient number, since it is larger than the sum of its proper divisors (115474186).

123172432 is an equidigital number, since it uses as much as digits as its factorization.

123172432 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7698285 (or 7698279 counting only the distinct ones).

The product of its digits is 2016, while the sum is 25.

The square root of 123172432 is about 11098.3076187318. The cubic root of 123172432 is about 497.5512696840.

The spelling of 123172432 in words is "one hundred twenty-three million, one hundred seventy-two thousand, four hundred thirty-two".