420908 has 6 divisors (see below), whose sum is σ = 736596. Its totient is φ = 210452.

The previous prime is 420899. The next prime is 420919. The reversal of 420908 is 809024.

420908 is nontrivially palindromic in base 3.

It is an unprimeable number.

420908 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 52610 + ... + 52617.

It is an arithmetic number, because the mean of its divisors is an integer number (122766).

2⁴²⁰⁹⁰⁸ is an apocalyptic number.

It is an amenable number.

420908 is a deficient number, since it is larger than the sum of its proper divisors (315688).

420908 is a wasteful number, since it uses less digits than its factorization.

420908 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 105231 (or 105229 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 23.

The square root of 420908 is about 648.7742288347. The cubic root of 420908 is about 74.9426524576.

The spelling of 420908 in words is "four hundred twenty thousand, nine hundred eight".