421314217 has 2 divisors, whose sum is σ = 421314218. Its totient is φ = 421314216.

The previous prime is 421314203. The next prime is 421314263. The reversal of 421314217 is 712413124.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 407393856 + 13920361 = 20184^2 + 3731^2 .

It is a cyclic number.

It is not a de Polignac number, because 421314217 - 2²³ = 412925609 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 421314191 and 421314200.

It is not a weakly prime, because it can be changed into another prime (421314277) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 210657108 + 210657109.

It is an arithmetic number, because the mean of its divisors is an integer number (210657109).

Almost surely, 2^421314217 is an apocalyptic number.

It is an amenable number.

421314217 is a deficient number, since it is larger than the sum of its proper divisors (1).

421314217 is an equidigital number, since it uses as much as digits as its factorization.

421314217 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1344, while the sum is 25.

The square root of 421314217 is about 20525.9401002731. The cubic root of 421314217 is about 749.6675367942.

The spelling of 421314217 in words is "four hundred twenty-one million, three hundred fourteen thousand, two hundred seventeen".