129731130 has 48 divisors (see below), whose sum is σ = 338181480. Its totient is φ = 34504704.

The previous prime is 129731113. The next prime is 129731149. The reversal of 129731130 is 31137921.

It can be written as a sum of positive squares in 4 ways, for example, as 70610409 + 59120721 = 8403^2 + 7689^2 .

It is a junction number, because it is equal to n+sod(n) for n = 129731094 and 129731103.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 37306 + ... + 40634.

Almost surely, 2^129731130 is an apocalyptic number.

129731130 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

129731130 is an abundant number, since it is smaller than the sum of its proper divisors (208450350).

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

129731130 is a wasteful number, since it uses less digits than its factorization.

129731130 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3775 (or 3772 counting only the distinct ones).

The product of its (nonzero) digits is 1134, while the sum is 27.

The square root of 129731130 is about 11389.9574187088. The cubic root of 129731130 is about 506.2302196204.

The spelling of 129731130 in words is "one hundred twenty-nine million, seven hundred thirty-one thousand, one hundred thirty".