8256642 has 16 divisors (see below), whose sum is σ = 16564800. Its totient is φ = 2743632.

The previous prime is 8256629. The next prime is 8256643. The reversal of 8256642 is 2466528.

It is an Ulam number.

It is not an unprimeable number, because it can be changed into a prime (8256643) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 123 + ... + 4065.

It is an arithmetic number, because the mean of its divisors is an integer number (1035300).

Almost surely, 2^8256642 is an apocalyptic number.

8256642 is an abundant number, since it is smaller than the sum of its proper divisors (8308158).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

8256642 is a wasteful number, since it uses less digits than its factorization.

8256642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4297.

The product of its digits is 23040, while the sum is 33.

The square root of 8256642 is about 2873.4373144372. The cubic root of 8256642 is about 202.1162125787.

The spelling of 8256642 in words is "eight million, two hundred fifty-six thousand, six hundred forty-two".