25573572 has 18 divisors (see below), whose sum is σ = 64644398. Its totient is φ = 8524512.

The previous prime is 25573567. The next prime is 25573589. The reversal of 25573572 is 27537552.

It is a happy number.

25573572 is a `hidden beast` number, since 2 + 557 + 35 + 72 = 666.

It can be written as a sum of positive squares in only one way, i.e., 23970816 + 1602756 = 4896^2 + 1266^2 .

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

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: 710377 = 25573572 / (2 + 5 + 5 + 7 + 3 + 5 + 7 + 2).

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 355153 + ... + 355224.

Almost surely, 2^25573572 is an apocalyptic number.

It is an amenable number.

25573572 is an abundant number, since it is smaller than the sum of its proper divisors (39070826).

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

25573572 is a wasteful number, since it uses less digits than its factorization.

25573572 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 710387 (or 710382 counting only the distinct ones).

The product of its digits is 73500, while the sum is 36.

The square root of 25573572 is about 5057.0319358296. The cubic root of 25573572 is about 294.6210666545.

The spelling of 25573572 in words is "twenty-five million, five hundred seventy-three thousand, five hundred seventy-two".