6563261 has 2 divisors, whose sum is σ = 6563262. Its totient is φ = 6563260.

The previous prime is 6563209. The next prime is 6563269. The reversal of 6563261 is 1623656.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 5808100 + 755161 = 2410^2 + 869^2 .

It is a cyclic number.

It is not a de Polignac number, because 6563261 - 2²² = 2368957 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6563269) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3281630 + 3281631.

It is an arithmetic number, because the mean of its divisors is an integer number (3281631).

Almost surely, 2^6563261 is an apocalyptic number.

It is an amenable number.

6563261 is a deficient number, since it is larger than the sum of its proper divisors (1).

6563261 is an equidigital number, since it uses as much as digits as its factorization.

6563261 is an evil number, because the sum of its binary digits is even.

The product of its digits is 6480, while the sum is 29.

The square root of 6563261 is about 2561.8862191752. The cubic root of 6563261 is about 187.2290462666.

The spelling of 6563261 in words is "six million, five hundred sixty-three thousand, two hundred sixty-one".