420450 has 24 divisors (see below), whose sum is σ = 1043088. Its totient is φ = 112080.

The previous prime is 420439. The next prime is 420457. The reversal of 420450 is 54024.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 420450.

It is not an unprimeable number, because it can be changed into a prime (420457) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1252 + ... + 1551.

It is an arithmetic number, because the mean of its divisors is an integer number (43462).

2⁴²⁰⁴⁵⁰ is an apocalyptic number.

420450 is an abundant number, since it is smaller than the sum of its proper divisors (622638).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

420450 is a wasteful number, since it uses less digits than its factorization.

420450 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2818 (or 2813 counting only the distinct ones).

The product of its (nonzero) digits is 160, while the sum is 15.

The square root of 420450 is about 648.4211594327. The cubic root of 420450 is about 74.9154602985.

Adding to 420450 its reverse (54024), we get a palindrome (474474).

The spelling of 420450 in words is "four hundred twenty thousand, four hundred fifty".