420897 has 8 divisors (see below), whose sum is σ = 564256. Its totient is φ = 279072.

The previous prime is 420859. The next prime is 420899. The reversal of 420897 is 798024.

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

It is not a de Polignac number, because 420897 - 2⁷ = 420769 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (420899) 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, 693 + ... + 1149.

It is an arithmetic number, because the mean of its divisors is an integer number (70532).

2⁴²⁰⁸⁹⁷ is an apocalyptic number.

It is an amenable number.

420897 is a deficient number, since it is larger than the sum of its proper divisors (143359).

420897 is a wasteful number, since it uses less digits than its factorization.

420897 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 767.

The product of its (nonzero) digits is 4032, while the sum is 30.

The square root of 420897 is about 648.7657512539. The cubic root of 420897 is about 74.9419996021.

The spelling of 420897 in words is "four hundred twenty thousand, eight hundred ninety-seven".