8557425 has 36 divisors (see below), whose sum is σ = 15567084. Its totient is φ = 4492800.

The previous prime is 8557421. The next prime is 8557447. The reversal of 8557425 is 5247558.

It is a happy number.

8557425 is a `hidden beast` number, since 85 + 574 + 2 + 5 = 666.

It can be written as a sum of positive squares in 6 ways, for example, as 400689 + 8156736 = 633^2 + 2856^2 .

It is not a de Polignac number, because 8557425 - 2² = 8557421 is a prime.

It is an Ulam number.

It is a self number, because there is not a number n which added to its sum of digits gives 8557425.

It is not an unprimeable number, because it can be changed into a prime (8557421) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 16165 + ... + 16685.

It is an arithmetic number, because the mean of its divisors is an integer number (432419).

Almost surely, 2^8557425 is an apocalyptic number.

It is an amenable number.

8557425 is a deficient number, since it is larger than the sum of its proper divisors (7009659).

8557425 is a wasteful number, since it uses less digits than its factorization.

8557425 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 610 (or 602 counting only the distinct ones).

The product of its digits is 56000, while the sum is 36.

The square root of 8557425 is about 2925.3076761257. The cubic root of 8557425 is about 204.5413103537.

The spelling of 8557425 in words is "eight million, five hundred fifty-seven thousand, four hundred twenty-five".