420764 has 12 divisors (see below), whose sum is σ = 756504. Its totient is φ = 204624.

The previous prime is 420757. The next prime is 420769. The reversal of 420764 is 467024.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (420769) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1274 + ... + 1569.

It is an arithmetic number, because the mean of its divisors is an integer number (63042).

2⁴²⁰⁷⁶⁴ is an apocalyptic number.

It is an amenable number.

420764 is a deficient number, since it is larger than the sum of its proper divisors (335740).

420764 is a wasteful number, since it uses less digits than its factorization.

420764 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2884 (or 2882 counting only the distinct ones).

The product of its (nonzero) digits is 1344, while the sum is 23.

The square root of 420764 is about 648.6632408269. The cubic root of 420764 is about 74.9341050847.

Adding to 420764 its reverse (467024), we get a palindrome (887788).

The spelling of 420764 in words is "four hundred twenty thousand, seven hundred sixty-four".