41401721 has 2 divisors, whose sum is σ = 41401722. Its totient is φ = 41401720.

The previous prime is 41401699. The next prime is 41401729. The reversal of 41401721 is 12710414.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 30085225 + 11316496 = 5485^2 + 3364^2 .

It is a cyclic number.

It is not a de Polignac number, because 41401721 - 2¹⁸ = 41139577 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 41401693 and 41401702.

It is not a weakly prime, because it can be changed into another prime (41401729) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20700860 + 20700861.

It is an arithmetic number, because the mean of its divisors is an integer number (20700861).

Almost surely, 2^41401721 is an apocalyptic number.

It is an amenable number.

41401721 is a deficient number, since it is larger than the sum of its proper divisors (1).

41401721 is an equidigital number, since it uses as much as digits as its factorization.

41401721 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 224, while the sum is 20.

The square root of 41401721 is about 6434.4169121996. The cubic root of 41401721 is about 345.9442619070.

The spelling of 41401721 in words is "forty-one million, four hundred one thousand, seven hundred twenty-one".