6356561 has 4 divisors (see below), whose sum is σ = 6504432. Its totient is φ = 6208692.

The previous prime is 6356557. The next prime is 6356569. The reversal of 6356561 is 1656536.

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 6356561 - 2² = 6356557 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (6356569) 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, 73871 + ... + 73956.

It is an arithmetic number, because the mean of its divisors is an integer number (1626108).

Almost surely, 2^6356561 is an apocalyptic number.

It is an amenable number.

6356561 is a deficient number, since it is larger than the sum of its proper divisors (147871).

6356561 is a wasteful number, since it uses less digits than its factorization.

6356561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 147870.

The product of its digits is 16200, while the sum is 32.

The square root of 6356561 is about 2521.2221242881. Note that the first 3 decimals coincide. The cubic root of 6356561 is about 185.2425452747.

The spelling of 6356561 in words is "six million, three hundred fifty-six thousand, five hundred sixty-one".