420464641 has 2 divisors, whose sum is σ = 420464642. Its totient is φ = 420464640.

The previous prime is 420464617. The next prime is 420464647. The reversal of 420464641 is 146464024.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 420414016 + 50625 = 20504^2 + 225^2 .

It is a cyclic number.

It is not a de Polignac number, because 420464641 - 2¹¹ = 420462593 is a prime.

It is not a weakly prime, because it can be changed into another prime (420464647) 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, 210232320 + 210232321.

It is an arithmetic number, because the mean of its divisors is an integer number (210232321).

Almost surely, 2^420464641 is an apocalyptic number.

It is an amenable number.

420464641 is a deficient number, since it is larger than the sum of its proper divisors (1).

420464641 is an equidigital number, since it uses as much as digits as its factorization.

420464641 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 18432, while the sum is 31.

The square root of 420464641 is about 20505.2344780546. The cubic root of 420464641 is about 749.1632986252.

The spelling of 420464641 in words is "four hundred twenty million, four hundred sixty-four thousand, six hundred forty-one".