421715707 has 6 divisors (see below), whose sum is σ = 490567308. Its totient is φ = 361470564.

The previous prime is 421715687. The next prime is 421715747. The reversal of 421715707 is 707517124.

It is not a de Polignac number, because 421715707 - 2⁷ = 421715579 is a prime.

It is not an unprimeable number, because it can be changed into a prime (421715747) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 4303173 + ... + 4303270.

It is an arithmetic number, because the mean of its divisors is an integer number (81761218).

Almost surely, 2^421715707 is an apocalyptic number.

421715707 is a deficient number, since it is larger than the sum of its proper divisors (68851601).

421715707 is an equidigital number, since it uses as much as digits as its factorization.

421715707 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8606457 (or 8606450 counting only the distinct ones).

The product of its (nonzero) digits is 13720, while the sum is 34.

The square root of 421715707 is about 20535.7178350307. The cubic root of 421715707 is about 749.9055922649.

The spelling of 421715707 in words is "four hundred twenty-one million, seven hundred fifteen thousand, seven hundred seven".