1474660721 has 2 divisors, whose sum is σ = 1474660722. Its totient is φ = 1474660720.

The previous prime is 1474660703. The next prime is 1474660723. The reversal of 1474660721 is 1270664741.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1080042496 + 394618225 = 32864^2 + 19865^2 .

It is a cyclic number.

It is not a de Polignac number, because 1474660721 - 2⁶ = 1474660657 is a prime.

It is a Sophie Germain prime.

Together with 1474660723, it forms a pair of twin primes.

It is a Chen prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (1474660723) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 737330360 + 737330361.

It is an arithmetic number, because the mean of its divisors is an integer number (737330361).

Almost surely, 2^1474660721 is an apocalyptic number.

It is an amenable number.

1474660721 is a deficient number, since it is larger than the sum of its proper divisors (1).

1474660721 is an equidigital number, since it uses as much as digits as its factorization.

1474660721 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 56448, while the sum is 38.

The square root of 1474660721 is about 38401.3114489597. The cubic root of 1474660721 is about 1138.2317722006.

The spelling of 1474660721 in words is "one billion, four hundred seventy-four million, six hundred sixty thousand, seven hundred twenty-one".