420750 has 96 divisors (see below), whose sum is σ = 1314144. Its totient is φ = 96000.

The previous prime is 420743. The next prime is 420757. The reversal of 420750 is 57024.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (420743) and next prime (420757).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 420750.

It is not an unprimeable number, because it can be changed into a prime (420757) 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 47 ways as a sum of consecutive naturals, for example, 24742 + ... + 24758.

It is an arithmetic number, because the mean of its divisors is an integer number (13689).

2⁴²⁰⁷⁵⁰ is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 420750, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (657072).

420750 is an abundant number, since it is smaller than the sum of its proper divisors (893394).

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

420750 is a wasteful number, since it uses less digits than its factorization.

420750 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51 (or 38 counting only the distinct ones).

The product of its (nonzero) digits is 280, while the sum is 18.

The square root of 420750 is about 648.6524493132. The cubic root of 420750 is about 74.9332739861.

Adding to 420750 its reverse (57024), we get a palindrome (477774).

The spelling of 420750 in words is "four hundred twenty thousand, seven hundred fifty".