129251604 has 48 divisors (see below), whose sum is σ = 319334400. Its totient is φ = 40575456.

The previous prime is 129251597. The next prime is 129251611. The reversal of 129251604 is 406152921.

It is an interprime number because it is at equal distance from previous prime (129251597) and next prime (129251611).

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 15 ways as a sum of consecutive naturals, for example, 39229 + ... + 42395.

It is an arithmetic number, because the mean of its divisors is an integer number (6652800).

Almost surely, 2^129251604 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 129251604, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (159667200).

129251604 is an abundant number, since it is smaller than the sum of its proper divisors (190082796).

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

129251604 is a wasteful number, since it uses less digits than its factorization.

129251604 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3372 (or 3370 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 30.

The square root of 129251604 is about 11368.8875445226. The cubic root of 129251604 is about 505.6057222170.

The spelling of 129251604 in words is "one hundred twenty-nine million, two hundred fifty-one thousand, six hundred four".