129516456 has 16 divisors (see below), whose sum is σ = 323791200. Its totient is φ = 43172144.

The previous prime is 129516433. The next prime is 129516467. The reversal of 129516456 is 654615921.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2698236 + ... + 2698283.

It is an arithmetic number, because the mean of its divisors is an integer number (20236950).

Almost surely, 2^129516456 is an apocalyptic number.

It is an amenable number.

129516456 is an abundant number, since it is smaller than the sum of its proper divisors (194274744).

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

129516456 is a wasteful number, since it uses less digits than its factorization.

129516456 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5396528 (or 5396524 counting only the distinct ones).

The product of its digits is 64800, while the sum is 39.

The square root of 129516456 is about 11380.5296889029. The cubic root of 129516456 is about 505.9508354696.

The spelling of 129516456 in words is "one hundred twenty-nine million, five hundred sixteen thousand, four hundred fifty-six".