41564021 has 2 divisors, whose sum is σ = 41564022. Its totient is φ = 41564020.

The previous prime is 41564009. The next prime is 41564063. The reversal of 41564021 is 12046514.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 38626225 + 2937796 = 6215^2 + 1714^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-41564021 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (41564071) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20782010 + 20782011.

It is an arithmetic number, because the mean of its divisors is an integer number (20782011).

Almost surely, 2^41564021 is an apocalyptic number.

It is an amenable number.

41564021 is a deficient number, since it is larger than the sum of its proper divisors (1).

41564021 is an equidigital number, since it uses as much as digits as its factorization.

41564021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 960, while the sum is 23.

The square root of 41564021 is about 6447.0164417349. The cubic root of 41564021 is about 346.3957209628.

The spelling of 41564021 in words is "forty-one million, five hundred sixty-four thousand, twenty-one".