420330641 has 2 divisors, whose sum is σ = 420330642. Its totient is φ = 420330640.

The previous prime is 420330607. The next prime is 420330649. The reversal of 420330641 is 146033024.

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., 383376400 + 36954241 = 19580^2 + 6079^2 .

It is a cyclic number.

It is not a de Polignac number, because 420330641 - 2⁶ = 420330577 is a prime.

It is not a weakly prime, because it can be changed into another prime (420330649) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 210165320 + 210165321.

It is an arithmetic number, because the mean of its divisors is an integer number (210165321).

Almost surely, 2^420330641 is an apocalyptic number.

It is an amenable number.

420330641 is a deficient number, since it is larger than the sum of its proper divisors (1).

420330641 is an equidigital number, since it uses as much as digits as its factorization.

420330641 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1728, while the sum is 23.

The square root of 420330641 is about 20501.9667593136. The cubic root of 420330641 is about 749.0837052909.

Adding to 420330641 its reverse (146033024), we get a palindrome (566363665).

The spelling of 420330641 in words is "four hundred twenty million, three hundred thirty thousand, six hundred forty-one".