129261480 has 32 divisors (see below), whose sum is σ = 387784800. Its totient is φ = 34469696.

The previous prime is 129261469. The next prime is 129261511. The reversal of 129261480 is 84162921.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 538470 + ... + 538709.

It is an arithmetic number, because the mean of its divisors is an integer number (12118275).

Almost surely, 2^129261480 is an apocalyptic number.

129261480 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

129261480 is an abundant number, since it is smaller than the sum of its proper divisors (258523320).

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

129261480 is a wasteful number, since it uses less digits than its factorization.

129261480 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1077193 (or 1077189 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 33.

The square root of 129261480 is about 11369.3218795142. The cubic root of 129261480 is about 505.6185995167.

The spelling of 129261480 in words is "one hundred twenty-nine million, two hundred sixty-one thousand, four hundred eighty".