426304721 has 2 divisors, whose sum is σ = 426304722. Its totient is φ = 426304720.

The previous prime is 426304673. The next prime is 426304759. The reversal of 426304721 is 127403624.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 425968321 + 336400 = 20639^2 + 580^2 .

It is a cyclic number.

It is not a de Polignac number, because 426304721 - 2⁶ = 426304657 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (426304771) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 213152360 + 213152361.

It is an arithmetic number, because the mean of its divisors is an integer number (213152361).

Almost surely, 2^426304721 is an apocalyptic number.

It is an amenable number.

426304721 is a deficient number, since it is larger than the sum of its proper divisors (1).

426304721 is an equidigital number, since it uses as much as digits as its factorization.

426304721 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 8064, while the sum is 29.

The square root of 426304721 is about 20647.1480112872. The cubic root of 426304721 is about 752.6158854356.

The spelling of 426304721 in words is "four hundred twenty-six million, three hundred four thousand, seven hundred twenty-one".