8256641 has 8 divisors (see below), whose sum is σ = 8395200. Its totient is φ = 8119440.

The previous prime is 8256629. The next prime is 8256643. The reversal of 8256641 is 1466528.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 8256641 - 2¹⁰ = 8255617 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 8256598 and 8256607.

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, 22820 + ... + 23178.

It is an arithmetic number, because the mean of its divisors is an integer number (1049400).

Almost surely, 2^8256641 is an apocalyptic number.

It is an amenable number.

8256641 is a deficient number, since it is larger than the sum of its proper divisors (138559).

8256641 is a wasteful number, since it uses less digits than its factorization.

8256641 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 679.

The product of its digits is 11520, while the sum is 32.

The square root of 8256641 is about 2873.4371404296. The cubic root of 8256641 is about 202.1162044189.

The spelling of 8256641 in words is "eight million, two hundred fifty-six thousand, six hundred forty-one".