129451232 has 24 divisors (see below), whose sum is σ = 255295152. Its totient is φ = 64614400.

The previous prime is 129451213. The next prime is 129451321. The reversal of 129451232 is 232154921.

It is a junction number, because it is equal to n+sod(n) for n = 129451195 and 129451204.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 17357 + ... + 23667.

It is an arithmetic number, because the mean of its divisors is an integer number (10637298).

Almost surely, 2^129451232 is an apocalyptic number.

It is an amenable number.

129451232 is a deficient number, since it is larger than the sum of its proper divisors (125843920).

129451232 is an equidigital number, since it uses as much as digits as its factorization.

129451232 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6962 (or 6954 counting only the distinct ones).

The product of its digits is 4320, while the sum is 29.

The square root of 129451232 is about 11377.6637320673. The cubic root of 129451232 is about 505.8658895627.

The spelling of 129451232 in words is "one hundred twenty-nine million, four hundred fifty-one thousand, two hundred thirty-two".