129770725 has 12 divisors (see below), whose sum is σ = 183903904. Its totient is φ = 88985520.

The previous prime is 129770717. The next prime is 129770801. The reversal of 129770725 is 527077921.

It is a happy number.

It is not a de Polignac number, because 129770725 - 2³ = 129770717 is a prime.

It is a hoax number, since the sum of its digits (40) coincides with the sum of the digits of its distinct prime factors.

It is a Duffinian number.

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, 370599 + ... + 370948.

Almost surely, 2^129770725 is an apocalyptic number.

It is an amenable number.

129770725 is a deficient number, since it is larger than the sum of its proper divisors (54133179).

129770725 is an equidigital number, since it uses as much as digits as its factorization.

129770725 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 741564 (or 741559 counting only the distinct ones).

The product of its (nonzero) digits is 61740, while the sum is 40.

The square root of 129770725 is about 11391.6954401002. The cubic root of 129770725 is about 506.2817162470.

The spelling of 129770725 in words is "one hundred twenty-nine million, seven hundred seventy thousand, seven hundred twenty-five".