129257244 has 36 divisors (see below), whose sum is σ = 327964000. Its totient is φ = 42923520.

The previous prime is 129257221. The next prime is 129257279. The reversal of 129257244 is 442752921.

It is a tau number, because it is divible by the number of its divisors (36).

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

It is a junction number, because it is equal to n+sod(n) for n = 129257199 and 129257208.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3132 + ... + 16380.

Almost surely, 2^129257244 is an apocalyptic number.

It is an amenable number.

129257244 is an abundant number, since it is smaller than the sum of its proper divisors (198706756).

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

129257244 is a wasteful number, since it uses less digits than its factorization.

129257244 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13530 (or 13525 counting only the distinct ones).

The product of its digits is 40320, while the sum is 36.

The square root of 129257244 is about 11369.1355871940. The cubic root of 129257244 is about 505.6130762838.

The spelling of 129257244 in words is "one hundred twenty-nine million, two hundred fifty-seven thousand, two hundred forty-four".