10404721 has 2 divisors, whose sum is σ = 10404722. Its totient is φ = 10404720.

The previous prime is 10404679. The next prime is 10404727. The reversal of 10404721 is 12740401.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 10400625 + 4096 = 3225^2 + 64^2 .

It is a cyclic number.

It is not a de Polignac number, because 10404721 - 2⁷ = 10404593 is a prime.

It is not a weakly prime, because it can be changed into another prime (10404727) 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, 5202360 + 5202361.

It is an arithmetic number, because the mean of its divisors is an integer number (5202361).

Almost surely, 2^10404721 is an apocalyptic number.

It is an amenable number.

10404721 is a deficient number, since it is larger than the sum of its proper divisors (1).

10404721 is an equidigital number, since it uses as much as digits as its factorization.

10404721 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 10404721 is about 3225.6349762489. The cubic root of 10404721 is about 218.3116002427.

The spelling of 10404721 in words is "ten million, four hundred four thousand, seven hundred twenty-one".