420876641 has 2 divisors, whose sum is σ = 420876642. Its totient is φ = 420876640.

The previous prime is 420876613. The next prime is 420876653. The reversal of 420876641 is 146678024.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 335036416 + 85840225 = 18304^2 + 9265^2 .

It is a cyclic number.

It is not a de Polignac number, because 420876641 - 2²² = 416682337 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 420876595 and 420876604.

It is not a weakly prime, because it can be changed into another prime (420876671) 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, 210438320 + 210438321.

It is an arithmetic number, because the mean of its divisors is an integer number (210438321).

Almost surely, 2^420876641 is an apocalyptic number.

It is an amenable number.

420876641 is a deficient number, since it is larger than the sum of its proper divisors (1).

420876641 is an equidigital number, since it uses as much as digits as its factorization.

420876641 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 64512, while the sum is 38.

The square root of 420876641 is about 20515.2782335507. The cubic root of 420876641 is about 749.4079125515.

The spelling of 420876641 in words is "four hundred twenty million, eight hundred seventy-six thousand, six hundred forty-one".