8625681 has 12 divisors (see below), whose sum is σ = 13192452. Its totient is φ = 5412096.

The previous prime is 8625649. The next prime is 8625689. The reversal of 8625681 is 1865268.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 2822400 + 5803281 = 1680^2 + 2409^2 .

It is not a de Polignac number, because 8625681 - 2⁵ = 8625649 is a prime.

It is a super-2 number, since 2×8625681² = 148804745427522, which contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (8625689) 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, 28036 + ... + 28341.

It is an arithmetic number, because the mean of its divisors is an integer number (1099371).

Almost surely, 2^8625681 is an apocalyptic number.

It is an amenable number.

8625681 is a deficient number, since it is larger than the sum of its proper divisors (4566771).

8625681 is a wasteful number, since it uses less digits than its factorization.

8625681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56400 (or 56397 counting only the distinct ones).

The product of its digits is 23040, while the sum is 36.

The square root of 8625681 is about 2936.9509699687. The cubic root of 8625681 is about 205.0836937661.

The spelling of 8625681 in words is "eight million, six hundred twenty-five thousand, six hundred eighty-one".