8557641 has 12 divisors (see below), whose sum is σ = 12460032. Its totient is φ = 5659416.

The previous prime is 8557609. The next prime is 8557649. The reversal of 8557641 is 1467558.

8557641 is a `hidden beast` number, since 8 + 5 + 5 + 7 + 641 = 666.

It is not a de Polignac number, because 8557641 - 2⁵ = 8557609 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 8557596 and 8557605.

It is not an unprimeable number, because it can be changed into a prime (8557649) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2601 + ... + 4886.

It is an arithmetic number, because the mean of its divisors is an integer number (1038336).

Almost surely, 2^8557641 is an apocalyptic number.

It is an amenable number.

8557641 is a deficient number, since it is larger than the sum of its proper divisors (3902391).

8557641 is a wasteful number, since it uses less digits than its factorization.

8557641 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7620 (or 7617 counting only the distinct ones).

The product of its digits is 33600, while the sum is 36.

The square root of 8557641 is about 2925.3445950862. The cubic root of 8557641 is about 204.5430312979.

The spelling of 8557641 in words is "eight million, five hundred fifty-seven thousand, six hundred forty-one".