421525312 has 56 divisors (see below), whose sum is σ = 925221416. Its totient is φ = 189278208.

The previous prime is 421525309. The next prime is 421525331. The reversal of 421525312 is 213525124.

It can be written as a sum of positive squares in 4 ways, for example, as 217149696 + 204375616 = 14736^2 + 14296^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 23938 + ... + 37630.

It is an arithmetic number, because the mean of its divisors is an integer number (16521811).

Almost surely, 2^421525312 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 421525312, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (462610708).

421525312 is an abundant number, since it is smaller than the sum of its proper divisors (503696104).

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

421525312 is a wasteful number, since it uses less digits than its factorization.

421525312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13755 (or 13745 counting only the distinct ones).

The product of its digits is 2400, while the sum is 25.

The square root of 421525312 is about 20531.0816081375. The cubic root of 421525312 is about 749.7927202002.

The spelling of 421525312 in words is "four hundred twenty-one million, five hundred twenty-five thousand, three hundred twelve".