41621681 has 2 divisors, whose sum is σ = 41621682. Its totient is φ = 41621680.

The previous prime is 41621677. The next prime is 41621687. The reversal of 41621681 is 18612614.

41621681 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 41280625 + 341056 = 6425^2 + 584^2 .

It is a cyclic number.

It is not a de Polignac number, because 41621681 - 2² = 41621677 is a prime.

It is a super-2 number, since 2×41621681² = 3464728658531522, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (41621687) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20810840 + 20810841.

It is an arithmetic number, because the mean of its divisors is an integer number (20810841).

Almost surely, 2^41621681 is an apocalyptic number.

It is an amenable number.

41621681 is a deficient number, since it is larger than the sum of its proper divisors (1).

41621681 is an equidigital number, since it uses as much as digits as its factorization.

41621681 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2304, while the sum is 29.

The square root of 41621681 is about 6451.4867278791. The cubic root of 41621681 is about 346.5558269705. Note that the first 3 decimals are identical.

The spelling of 41621681 in words is "forty-one million, six hundred twenty-one thousand, six hundred eighty-one".