41400721 has 2 divisors, whose sum is σ = 41400722. Its totient is φ = 41400720.

The previous prime is 41400691. The next prime is 41400757. The reversal of 41400721 is 12700414.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 30747025 + 10653696 = 5545^2 + 3264^2 .

It is a cyclic number.

It is not a de Polignac number, because 41400721 - 2¹¹ = 41398673 is a prime.

It is not a weakly prime, because it can be changed into another prime (41400781) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20700360 + 20700361.

It is an arithmetic number, because the mean of its divisors is an integer number (20700361).

Almost surely, 2^41400721 is an apocalyptic number.

It is an amenable number.

41400721 is a deficient number, since it is larger than the sum of its proper divisors (1).

41400721 is an equidigital number, since it uses as much as digits as its factorization.

41400721 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 224, while the sum is 19.

The square root of 41400721 is about 6434.3392046115. The cubic root of 41400721 is about 345.9414766198.

The spelling of 41400721 in words is "forty-one million, four hundred thousand, seven hundred twenty-one".