128915252 has 24 divisors (see below), whose sum is σ = 232361640. Its totient is φ = 62536320.

The previous prime is 128915251. The next prime is 128915257. The reversal of 128915252 is 252519821.

It can be written as a sum of positive squares in 4 ways, for example, as 682276 + 128232976 = 826^2 + 11324^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128915251) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 61274 + ... + 63342.

It is an arithmetic number, because the mean of its divisors is an integer number (9681735).

Almost surely, 2^128915252 is an apocalyptic number.

It is an amenable number.

128915252 is a deficient number, since it is larger than the sum of its proper divisors (103446388).

128915252 is a wasteful number, since it uses less digits than its factorization.

128915252 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2531 (or 2529 counting only the distinct ones).

The product of its digits is 14400, while the sum is 35.

The square root of 128915252 is about 11354.0852559773. The cubic root of 128915252 is about 505.1667612512.

The spelling of 128915252 in words is "one hundred twenty-eight million, nine hundred fifteen thousand, two hundred fifty-two".