420492641 has 2 divisors, whose sum is σ = 420492642. Its totient is φ = 420492640.

The previous prime is 420492623. The next prime is 420492643. The reversal of 420492641 is 146294024.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 288150625 + 132342016 = 16975^2 + 11504^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-420492641 is a prime.

It is a super-2 number, since 2×420492641² = 353628122270309762, which contains 22 as substring.

Together with 420492643, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 420492598 and 420492607.

It is not a weakly prime, because it can be changed into another prime (420492643) 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, 210246320 + 210246321.

It is an arithmetic number, because the mean of its divisors is an integer number (210246321).

Almost surely, 2^420492641 is an apocalyptic number.

It is an amenable number.

420492641 is a deficient number, since it is larger than the sum of its proper divisors (1).

420492641 is an equidigital number, since it uses as much as digits as its factorization.

420492641 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 13824, while the sum is 32.

The square root of 420492641 is about 20505.9172191833. The cubic root of 420492641 is about 749.1799279322.

The spelling of 420492641 in words is "four hundred twenty million, four hundred ninety-two thousand, six hundred forty-one".