421079 has 2 divisors, whose sum is σ = 421080. Its totient is φ = 421078.

The previous prime is 421049. The next prime is 421081. The reversal of 421079 is 970124.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-421079 is a prime.

It is a Sophie Germain prime.

Together with 421081, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (421009) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 210539 + 210540.

It is an arithmetic number, because the mean of its divisors is an integer number (210540).

2⁴²¹⁰⁷⁹ is an apocalyptic number.

421079 is a deficient number, since it is larger than the sum of its proper divisors (1).

421079 is an equidigital number, since it uses as much as digits as its factorization.

421079 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 504, while the sum is 23.

The square root of 421079 is about 648.9060024379. The cubic root of 421079 is about 74.9527999312.

The spelling of 421079 in words is "four hundred twenty-one thousand, seventy-nine".