421042379 has 2 divisors, whose sum is σ = 421042380. Its totient is φ = 421042378.

The previous prime is 421042343. The next prime is 421042399. The reversal of 421042379 is 973240124.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 421042379 - 2²⁴ = 404265163 is a prime.

It is not a weakly prime, because it can be changed into another prime (421042339) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 210521189 + 210521190.

It is an arithmetic number, because the mean of its divisors is an integer number (210521190).

Almost surely, 2^421042379 is an apocalyptic number.

421042379 is a deficient number, since it is larger than the sum of its proper divisors (1).

421042379 is an equidigital number, since it uses as much as digits as its factorization.

421042379 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 12096, while the sum is 32.

The square root of 421042379 is about 20519.3172157360. The cubic root of 421042379 is about 749.5062700085.

The spelling of 421042379 in words is "four hundred twenty-one million, forty-two thousand, three hundred seventy-nine".