128651252 has 6 divisors (see below), whose sum is σ = 225139698. Its totient is φ = 64325624.

The previous prime is 128651249. The next prime is 128651309. The reversal of 128651252 is 252156821.

It can be written as a sum of positive squares in only one way, i.e., 127148176 + 1503076 = 11276^2 + 1226^2 .

It is a super-2 number, since 2×128651252² = 33102289282335008, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16081403 + ... + 16081410.

It is an arithmetic number, because the mean of its divisors is an integer number (37523283).

Almost surely, 2^128651252 is an apocalyptic number.

It is an amenable number.

128651252 is a deficient number, since it is larger than the sum of its proper divisors (96488446).

128651252 is a wasteful number, since it uses less digits than its factorization.

128651252 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32162817 (or 32162815 counting only the distinct ones).

The product of its digits is 9600, while the sum is 32.

The square root of 128651252 is about 11342.4535264642. The cubic root of 128651252 is about 504.8216891633.

The spelling of 128651252 in words is "one hundred twenty-eight million, six hundred fifty-one thousand, two hundred fifty-two".