420011217 has 8 divisors (see below), whose sum is σ = 622238880. Its totient is φ = 280007460.

The previous prime is 420011209. The next prime is 420011243. The reversal of 420011217 is 712110024.

It is not a de Polignac number, because 420011217 - 2³ = 420011209 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 420011217.

It is not an unprimeable number, because it can be changed into a prime (420011287) 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 in 7 ways as a sum of consecutive naturals, for example, 7777959 + ... + 7778012.

It is an arithmetic number, because the mean of its divisors is an integer number (77779860).

Almost surely, 2^420011217 is an apocalyptic number.

It is an amenable number.

420011217 is a deficient number, since it is larger than the sum of its proper divisors (202227663).

420011217 is a wasteful number, since it uses less digits than its factorization.

420011217 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15555980 (or 15555974 counting only the distinct ones).

The product of its (nonzero) digits is 112, while the sum is 18.

The square root of 420011217 is about 20494.1751968700. The cubic root of 420011217 is about 748.8939055420.

The spelling of 420011217 in words is "four hundred twenty million, eleven thousand, two hundred seventeen".