421278359 has 2 divisors, whose sum is σ = 421278360. Its totient is φ = 421278358.

The previous prime is 421278329. The next prime is 421278409. The reversal of 421278359 is 953872124.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 421278359 - 2²⁴ = 404501143 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (421278329) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 210639179 + 210639180.

It is an arithmetic number, because the mean of its divisors is an integer number (210639180).

Almost surely, 2^421278359 is an apocalyptic number.

421278359 is a deficient number, since it is larger than the sum of its proper divisors (1).

421278359 is an equidigital number, since it uses as much as digits as its factorization.

421278359 is an evil number, because the sum of its binary digits is even.

The product of its digits is 120960, while the sum is 41.

The square root of 421278359 is about 20525.0666015972. The cubic root of 421278359 is about 749.6462681542.

The spelling of 421278359 in words is "four hundred twenty-one million, two hundred seventy-eight thousand, three hundred fifty-nine".