6356641 has 2 divisors, whose sum is σ = 6356642. Its totient is φ = 6356640.

The previous prime is 6356639. The next prime is 6356653. The reversal of 6356641 is 1466536.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 6350400 + 6241 = 2520^2 + 79^2 .

It is a cyclic number.

It is not a de Polignac number, because 6356641 - 2¹ = 6356639 is a prime.

Together with 6356639, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (6356611) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3178320 + 3178321.

It is an arithmetic number, because the mean of its divisors is an integer number (3178321).

Almost surely, 2^6356641 is an apocalyptic number.

It is an amenable number.

6356641 is a deficient number, since it is larger than the sum of its proper divisors (1).

6356641 is an equidigital number, since it uses as much as digits as its factorization.

6356641 is an evil number, because the sum of its binary digits is even.

The product of its digits is 12960, while the sum is 31.

The square root of 6356641 is about 2521.2379895599. The cubic root of 6356641 is about 185.2433223899.

The spelling of 6356641 in words is "six million, three hundred fifty-six thousand, six hundred forty-one".