129515268 has 24 divisors (see below), whose sum is σ = 308633472. Its totient is φ = 42253024.

The previous prime is 129515263. The next prime is 129515297. The reversal of 129515268 is 862515921.

It is a super-2 number, since 2×129515268² = 33548409290223648, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (129515263) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 114255 + ... + 115382.

It is an arithmetic number, because the mean of its divisors is an integer number (12859728).

Almost surely, 2^129515268 is an apocalyptic number.

It is an amenable number.

129515268 is an abundant number, since it is smaller than the sum of its proper divisors (179118204).

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

129515268 is a wasteful number, since it uses less digits than its factorization.

129515268 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 229691 (or 229689 counting only the distinct ones).

The product of its digits is 43200, while the sum is 39.

The square root of 129515268 is about 11380.4774943761. The cubic root of 129515268 is about 505.9492885068.

The spelling of 129515268 in words is "one hundred twenty-nine million, five hundred fifteen thousand, two hundred sixty-eight".