252725128 has 32 divisors (see below), whose sum is σ = 502572600. Its totient is φ = 118730752.

The previous prime is 252725101. The next prime is 252725141. The reversal of 252725128 is 821527252.

It can be written as a sum of positive squares in 4 ways, for example, as 252237924 + 487204 = 15882^2 + 698^2 .

It is a super-4 number, since 4×252725128⁴ (a number of 35 digits) contains 4444 as substring.

It is a Harshad number since it is a multiple of its sum of digits (34).

It is a junction number, because it is equal to n+sod(n) for n = 252725093 and 252725102.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 108876 + ... + 111172.

Almost surely, 2^252725128 is an apocalyptic number.

It is an amenable number.

252725128 is a deficient number, since it is larger than the sum of its proper divisors (249847472).

252725128 is a wasteful number, since it uses less digits than its factorization.

252725128 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3129 (or 3125 counting only the distinct ones).

The product of its digits is 22400, while the sum is 34.

The square root of 252725128 is about 15897.3308451450. The cubic root of 252725128 is about 632.2412220776.

The spelling of 252725128 in words is "two hundred fifty-two million, seven hundred twenty-five thousand, one hundred twenty-eight".