421500 has 48 divisors (see below), whose sum is σ = 1231776. Its totient is φ = 112000.

The previous prime is 421493. The next prime is 421501. The reversal of 421500 is 5124.

It is a Harshad number since it is a multiple of its sum of digits (12).

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 421500.

It is not an unprimeable number, because it can be changed into a prime (421501) by changing a digit.

421500 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 15 ways as a sum of consecutive naturals, for example, 1360 + ... + 1640.

It is an arithmetic number, because the mean of its divisors is an integer number (25662).

2⁴²¹⁵⁰⁰ is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 421500, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (615888).

421500 is an abundant number, since it is smaller than the sum of its proper divisors (810276).

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

421500 is a wasteful number, since it uses less digits than its factorization.

421500 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 303 (or 291 counting only the distinct ones).

The product of its (nonzero) digits is 40, while the sum is 12.

The square root of 421500 is about 649.2303135252. The cubic root of 421500 is about 74.9777711902.

Adding to 421500 its reverse (5124), we get a palindrome (426624).

The spelling of 421500 in words is "four hundred twenty-one thousand, five hundred".