420490 has 16 divisors (see below), whose sum is σ = 865152. Its totient is φ = 144144.

The previous prime is 420481. The next prime is 420499. The reversal of 420490 is 94024.

It is an interprime number because it is at equal distance from previous prime (420481) and next prime (420499).

It is not an unprimeable number, because it can be changed into a prime (420499) by changing a digit.

420490 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2934 + ... + 3073.

It is an arithmetic number, because the mean of its divisors is an integer number (54072).

2⁴²⁰⁴⁹⁰ is an apocalyptic number.

420490 is an abundant number, since it is smaller than the sum of its proper divisors (444662).

It is a weird number, because it is abundant, but not a pseudoperfect number.

420490 is a wasteful number, since it uses less digits than its factorization.

420490 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6021.

The product of its (nonzero) digits is 288, while the sum is 19.

The square root of 420490 is about 648.4520028499. The cubic root of 420490 is about 74.9178359464.

The spelling of 420490 in words is "four hundred twenty thousand, four hundred ninety".