129020460 has 24 divisors (see below), whose sum is σ = 361257456. Its totient is φ = 34405440.

The previous prime is 129020453. The next prime is 129020471. The reversal of 129020460 is 64020921.

It is a super-2 number, since 2×129020460² = 33292558197223200, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 129020460.

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 7 ways as a sum of consecutive naturals, for example, 1075111 + ... + 1075230.

It is an arithmetic number, because the mean of its divisors is an integer number (15052394).

Almost surely, 2^129020460 is an apocalyptic number.

129020460 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

129020460 is an abundant number, since it is smaller than the sum of its proper divisors (232236996).

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

129020460 is a wasteful number, since it uses less digits than its factorization.

129020460 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2150353 (or 2150351 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 24.

The square root of 129020460 is about 11358.7173571667. The cubic root of 129020460 is about 505.3041464258.

The spelling of 129020460 in words is "one hundred twenty-nine million, twenty thousand, four hundred sixty".