420497 has 16 divisors (see below), whose sum is σ = 540672. Its totient is φ = 317520.

The previous prime is 420481. The next prime is 420499. The reversal of 420497 is 794024.

It is not a de Polignac number, because 420497 - 2⁴ = 420481 is a prime.

It is a Smith number, since the sum of its digits (26) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (420499) 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, 3248 + ... + 3374.

It is an arithmetic number, because the mean of its divisors is an integer number (33792).

2⁴²⁰⁴⁹⁷ is an apocalyptic number.

It is an amenable number.

420497 is a deficient number, since it is larger than the sum of its proper divisors (120175).

420497 is a wasteful number, since it uses less digits than its factorization.

420497 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 188.

The product of its (nonzero) digits is 2016, while the sum is 26.

The square root of 420497 is about 648.4574002970. The cubic root of 420497 is about 74.9182516693.

The spelling of 420497 in words is "four hundred twenty thousand, four hundred ninety-seven".