129270456 has 48 divisors (see below), whose sum is σ = 400124400. Its totient is φ = 36934272.

The previous prime is 129270443. The next prime is 129270473. The reversal of 129270456 is 654072921.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a self number, because there is not a number n which added to its sum of digits gives 129270456.

It is a congruent number.

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 11 ways as a sum of consecutive naturals, for example, 127741 + ... + 128748.

It is an arithmetic number, because the mean of its divisors is an integer number (8335925).

Almost surely, 2^129270456 is an apocalyptic number.

It is an amenable number.

129270456 is an abundant number, since it is smaller than the sum of its proper divisors (270853944).

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

129270456 is a wasteful number, since it uses less digits than its factorization.

129270456 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 256508 (or 256501 counting only the distinct ones).

The product of its (nonzero) digits is 30240, while the sum is 36.

The square root of 129270456 is about 11369.7166191599. The cubic root of 129270456 is about 505.6303027390.

The spelling of 129270456 in words is "one hundred twenty-nine million, two hundred seventy thousand, four hundred fifty-six".