40914721 has 2 divisors, whose sum is σ = 40914722. Its totient is φ = 40914720.

The previous prime is 40914719. The next prime is 40914739. The reversal of 40914721 is 12741904.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 39237696 + 1677025 = 6264^2 + 1295^2 .

It is a cyclic number.

It is not a de Polignac number, because 40914721 - 2¹ = 40914719 is a prime.

Together with 40914719, it forms a pair of twin primes.

It is equal to p_2485900 and since 40914721 and 2485900 have the same sum of digits, it is a Honaker prime.

It is a self number, because there is not a number n which added to its sum of digits gives 40914721.

It is not a weakly prime, because it can be changed into another prime (40914751) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20457360 + 20457361.

It is an arithmetic number, because the mean of its divisors is an integer number (20457361).

Almost surely, 2^40914721 is an apocalyptic number.

It is an amenable number.

40914721 is a deficient number, since it is larger than the sum of its proper divisors (1).

40914721 is an equidigital number, since it uses as much as digits as its factorization.

40914721 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2016, while the sum is 28.

The square root of 40914721 is about 6396.4615999785. The cubic root of 40914721 is about 344.5824844988.

The spelling of 40914721 in words is "forty million, nine hundred fourteen thousand, seven hundred twenty-one".