8557001 has 12 divisors (see below), whose sum is σ = 9412620. Its totient is φ = 7768320.

The previous prime is 8556959. The next prime is 8557007. The reversal of 8557001 is 1007558.

It can be written as a sum of positive squares in 6 ways, for example, as 1000000 + 7557001 = 1000^2 + 2749^2 .

It is not a de Polignac number, because 8557001 - 2⁶ = 8556937 is a prime.

It is a super-2 number, since 2×8557001² = 146444532228002, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (8557007) 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, 7871 + ... + 8891.

It is an arithmetic number, because the mean of its divisors is an integer number (784385).

Almost surely, 2^8557001 is an apocalyptic number.

It is an amenable number.

8557001 is a deficient number, since it is larger than the sum of its proper divisors (855619).

8557001 is a wasteful number, since it uses less digits than its factorization.

8557001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1084 (or 1067 counting only the distinct ones).

The product of its (nonzero) digits is 1400, while the sum is 26.

The square root of 8557001 is about 2925.2352042186. The cubic root of 8557001 is about 204.5379321199.

The spelling of 8557001 in words is "eight million, five hundred fifty-seven thousand, one".