421321472 has 144 divisors (see below), whose sum is σ = 1047688992. Its totient is φ = 166133760.

The previous prime is 421321463. The next prime is 421321513. The reversal of 421321472 is 274123124.

It is a Harshad number since it is a multiple of its sum of digits (26).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 621998 + ... + 622674.

It is an arithmetic number, because the mean of its divisors is an integer number (7275618).

Almost surely, 2^421321472 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 421321472, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (523844496).

421321472 is an abundant number, since it is smaller than the sum of its proper divisors (626367520).

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

421321472 is a wasteful number, since it uses less digits than its factorization.

421321472 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 734 (or 720 counting only the distinct ones).

The product of its digits is 2688, while the sum is 26.

The square root of 421321472 is about 20526.1168271059. The cubic root of 421321472 is about 749.6718398429.

Adding to 421321472 its reverse (274123124), we get a palindrome (695444596).

The spelling of 421321472 in words is "four hundred twenty-one million, three hundred twenty-one thousand, four hundred seventy-two".