129942576 has 120 divisors (see below), whose sum is σ = 386634480. Its totient is φ = 41783040.

The previous prime is 129942569. The next prime is 129942583. The reversal of 129942576 is 675249921.

It is an interprime number because it is at equal distance from previous prime (129942569) and next prime (129942583).

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, 414996 + ... + 415308.

It is an arithmetic number, because the mean of its divisors is an integer number (3221954).

Almost surely, 2^129942576 is an apocalyptic number.

129942576 is a gapful number since it is divisible by the number (16) 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 129942576, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (193317240).

129942576 is an abundant number, since it is smaller than the sum of its proper divisors (256691904).

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

129942576 is a wasteful number, since it uses less digits than its factorization.

129942576 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 392 (or 349 counting only the distinct ones).

The product of its digits is 272160, while the sum is 45.

The square root of 129942576 is about 11399.2357638572. The cubic root of 129942576 is about 506.5051016099.

The spelling of 129942576 in words is "one hundred twenty-nine million, nine hundred forty-two thousand, five hundred seventy-six".