8656401 has 16 divisors (see below), whose sum is σ = 12511296. Its totient is φ = 5292096.

The previous prime is 8656399. The next prime is 8656411. The reversal of 8656401 is 1046568.

It is not a de Polignac number, because 8656401 - 2¹ = 8656399 is a prime.

It is not an unprimeable number, because it can be changed into a prime (8656411) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6106 + ... + 7388.

It is an arithmetic number, because the mean of its divisors is an integer number (781956).

Almost surely, 2^8656401 is an apocalyptic number.

It is an amenable number.

8656401 is a deficient number, since it is larger than the sum of its proper divisors (3854895).

8656401 is a wasteful number, since it uses less digits than its factorization.

8656401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1472.

The product of its (nonzero) digits is 5760, while the sum is 30.

The square root of 8656401 is about 2942.1762353741. The cubic root of 8656401 is about 205.3268709549.

The spelling of 8656401 in words is "eight million, six hundred fifty-six thousand, four hundred one".