420404217 has 8 divisors (see below), whose sum is σ = 561122496. Its totient is φ = 279977712.

The previous prime is 420404191. The next prime is 420404219. The reversal of 420404217 is 712404024.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 420404217 - 2¹⁴ = 420387833 is a prime.

It is not an unprimeable number, because it can be changed into a prime (420404219) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 69558 + ... + 75359.

It is an arithmetic number, because the mean of its divisors is an integer number (70140312).

Almost surely, 2^420404217 is an apocalyptic number.

It is an amenable number.

420404217 is a deficient number, since it is larger than the sum of its proper divisors (140718279).

420404217 is a wasteful number, since it uses less digits than its factorization.

420404217 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 145887.

The product of its (nonzero) digits is 1792, while the sum is 24.

The square root of 420404217 is about 20503.7610452327. The cubic root of 420404217 is about 749.1274100650.

The spelling of 420404217 in words is "four hundred twenty million, four hundred four thousand, two hundred seventeen".