420495 has 24 divisors (see below), whose sum is σ = 722064. Its totient is φ = 208896.

The previous prime is 420481. The next prime is 420499. The reversal of 420495 is 594024.

It is not a de Polignac number, because 420495 - 2⁴ = 420479 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (420499) 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 23 ways as a sum of consecutive naturals, for example, 4287 + ... + 4383.

It is an arithmetic number, because the mean of its divisors is an integer number (30086).

2⁴²⁰⁴⁹⁵ is an apocalyptic number.

420495 is a deficient number, since it is larger than the sum of its proper divisors (301569).

420495 is a wasteful number, since it uses less digits than its factorization.

420495 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 139 (or 122 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 24.

The square root of 420495 is about 648.4558581739. The cubic root of 420495 is about 74.9181328918.

The spelling of 420495 in words is "four hundred twenty thousand, four hundred ninety-five".