420797 has 4 divisors (see below), whose sum is σ = 453180. Its totient is φ = 388416.

The previous prime is 420781. The next prime is 420799. The reversal of 420797 is 797024.

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 37636 + 383161 = 194^2 + 619^2 .

It is a cyclic number.

It is not a de Polignac number, because 420797 - 2⁴ = 420781 is a prime.

It is a plaindrome in base 16.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (420799) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16172 + ... + 16197.

It is an arithmetic number, because the mean of its divisors is an integer number (113295).

2⁴²⁰⁷⁹⁷ is an apocalyptic number.

It is an amenable number.

420797 is a deficient number, since it is larger than the sum of its proper divisors (32383).

420797 is a wasteful number, since it uses less digits than its factorization.

420797 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32382.

The product of its (nonzero) digits is 3528, while the sum is 29.

The square root of 420797 is about 648.6886772559. The cubic root of 420797 is about 74.9360640299.

The spelling of 420797 in words is "four hundred twenty thousand, seven hundred ninety-seven".