128925252 has 18 divisors (see below), whose sum is σ = 325894478. Its totient is φ = 42975072.

The previous prime is 128925239. The next prime is 128925259. The reversal of 128925252 is 252529821.

128925252 is a `hidden beast` number, since 128 + 9 + 2 + 525 + 2 = 666.

It can be written as a sum of positive squares in only one way, i.e., 68459076 + 60466176 = 8274^2 + 7776^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (36), and also a Moran number because the ratio is a prime number: 3581257 = 128925252 / (1 + 2 + 8 + 9 + 2 + 5 + 2 + 5 + 2).

It is not an unprimeable number, because it can be changed into a prime (128925259) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1790593 + ... + 1790664.

Almost surely, 2^128925252 is an apocalyptic number.

128925252 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

128925252 is an abundant number, since it is smaller than the sum of its proper divisors (196969226).

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

128925252 is a wasteful number, since it uses less digits than its factorization.

128925252 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3581267 (or 3581262 counting only the distinct ones).

The product of its digits is 28800, while the sum is 36.

The square root of 128925252 is about 11354.5256175676. The cubic root of 128925252 is about 505.1798228994.

The spelling of 128925252 in words is "one hundred twenty-eight million, nine hundred twenty-five thousand, two hundred fifty-two".