420354217 has 4 divisors (see below), whose sum is σ = 434849220. Its totient is φ = 405859216.

The previous prime is 420354211. The next prime is 420354281. The reversal of 420354217 is 712453024.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 122412096 + 297942121 = 11064^2 + 17261^2 .

It is a cyclic number.

It is not a de Polignac number, because 420354217 - 2¹⁵ = 420321449 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (420354211) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7247458 + ... + 7247515.

It is an arithmetic number, because the mean of its divisors is an integer number (108712305).

Almost surely, 2^420354217 is an apocalyptic number.

It is an amenable number.

420354217 is a deficient number, since it is larger than the sum of its proper divisors (14495003).

420354217 is a wasteful number, since it uses less digits than its factorization.

420354217 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14495002.

The product of its (nonzero) digits is 6720, while the sum is 28.

The square root of 420354217 is about 20502.5417204794. The cubic root of 420354217 is about 749.0977101920.

The spelling of 420354217 in words is "four hundred twenty million, three hundred fifty-four thousand, two hundred seventeen".