421403250 has 96 divisors (see below), whose sum is σ = 1076429952. Its totient is φ = 109800000.

The previous prime is 421403221. The next prime is 421403251. The reversal of 421403250 is 52304124.

It is a super-2 number, since 2×421403250² = 355161398221125000, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (421403251) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 2790675 + ... + 2790825.

It is an arithmetic number, because the mean of its divisors is an integer number (11212812).

Almost surely, 2^421403250 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 421403250, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (538214976).

421403250 is an abundant number, since it is smaller than the sum of its proper divisors (655026702).

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

421403250 is a wasteful number, since it uses less digits than its factorization.

421403250 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 293 (or 222 counting only the distinct ones).

The product of its (nonzero) digits is 960, while the sum is 21.

The square root of 421403250 is about 20528.1087779659. The cubic root of 421403250 is about 749.7203401779.

Adding to 421403250 its reverse (52304124), we get a palindrome (473707374).

The spelling of 421403250 in words is "four hundred twenty-one million, four hundred three thousand, two hundred fifty".