8256401 has 4 divisors (see below), whose sum is σ = 8396400. Its totient is φ = 8116404.

The previous prime is 8256389. The next prime is 8256403. The reversal of 8256401 is 1046528.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 8256401 - 2⁶ = 8256337 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (8256403) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 69911 + ... + 70028.

It is an arithmetic number, because the mean of its divisors is an integer number (2099100).

Almost surely, 2^8256401 is an apocalyptic number.

It is an amenable number.

8256401 is a deficient number, since it is larger than the sum of its proper divisors (139999).

8256401 is a wasteful number, since it uses less digits than its factorization.

8256401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 139998.

The product of its (nonzero) digits is 1920, while the sum is 26.

The square root of 8256401 is about 2873.3953782938. The cubic root of 8256401 is about 202.1142460616.

It can be divided in two parts, 825 and 6401, that multiplied together give a palindrome (5280825).

The spelling of 8256401 in words is "eight million, two hundred fifty-six thousand, four hundred one".