420605317 has 16 divisors (see below), whose sum is σ = 473457600. Its totient is φ = 373425360.

The previous prime is 420605281. The next prime is 420605321. The reversal of 420605317 is 713506024.

It is not a de Polignac number, because 420605317 - 2²³ = 412216709 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (420605417) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 53559 + ... + 60907.

It is an arithmetic number, because the mean of its divisors is an integer number (29591100).

Almost surely, 2^420605317 is an apocalyptic number.

It is an amenable number.

420605317 is a deficient number, since it is larger than the sum of its proper divisors (52852283).

420605317 is an equidigital number, since it uses as much as digits as its factorization.

420605317 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7425 (or 7403 counting only the distinct ones).

The product of its (nonzero) digits is 5040, while the sum is 28.

The square root of 420605317 is about 20508.6644372568. The cubic root of 420605317 is about 749.2468391775.

The spelling of 420605317 in words is "four hundred twenty million, six hundred five thousand, three hundred seventeen".