420485 has 8 divisors (see below), whose sum is σ = 543480. Its totient is φ = 310464.

The previous prime is 420481. The next prime is 420499. The reversal of 420485 is 584024.

It can be written as a sum of positive squares in 4 ways, for example, as 9604 + 410881 = 98^2 + 641^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 420485 - 2² = 420481 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 420485.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (420481) 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, 3170 + ... + 3299.

It is an arithmetic number, because the mean of its divisors is an integer number (67935).

2⁴²⁰⁴⁸⁵ is an apocalyptic number.

It is an amenable number.

420485 is a deficient number, since it is larger than the sum of its proper divisors (122995).

420485 is a wasteful number, since it uses less digits than its factorization.

420485 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6487.

The product of its (nonzero) digits is 1280, while the sum is 23.

The square root of 420485 is about 648.4481475029. The cubic root of 420485 is about 74.9175389986.

The spelling of 420485 in words is "four hundred twenty thousand, four hundred eighty-five".