129874525 has 24 divisors (see below), whose sum is σ = 176667264. Its totient is φ = 93926400.

The previous prime is 129874513. The next prime is 129874553. The reversal of 129874525 is 525478921.

It is not a de Polignac number, because 129874525 - 2⁹ = 129874013 is a prime.

It is an alternating number because its digits alternate between odd and even.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 51852 + ... + 54298.

It is an arithmetic number, because the mean of its divisors is an integer number (7361136).

Almost surely, 2^129874525 is an apocalyptic number.

It is an amenable number.

129874525 is a deficient number, since it is larger than the sum of its proper divisors (46792739).

129874525 is a wasteful number, since it uses less digits than its factorization.

129874525 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2661 (or 2656 counting only the distinct ones).

The product of its digits is 201600, while the sum is 43.

The square root of 129874525 is about 11396.2504798728. The cubic root of 129874525 is about 506.4166671684.

The spelling of 129874525 in words is "one hundred twenty-nine million, eight hundred seventy-four thousand, five hundred twenty-five".