129144736 has 24 divisors (see below), whose sum is σ = 290576160. Its totient is φ = 55347648.

The previous prime is 129144727. The next prime is 129144749. The reversal of 129144736 is 637441921.

It is a junction number, because it is equal to n+sod(n) for n = 129144695 and 129144704.

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, 288046 + ... + 288493.

It is an arithmetic number, because the mean of its divisors is an integer number (12107340).

Almost surely, 2^129144736 is an apocalyptic number.

129144736 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

129144736 is an abundant number, since it is smaller than the sum of its proper divisors (161431424).

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

129144736 is an equidigital number, since it uses as much as digits as its factorization.

129144736 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 576556 (or 576548 counting only the distinct ones).

The product of its digits is 36288, while the sum is 37.

The square root of 129144736 is about 11364.1865524990. The cubic root of 129144736 is about 505.4663352400.

The spelling of 129144736 in words is "one hundred twenty-nine million, one hundred forty-four thousand, seven hundred thirty-six".