421045722 has 64 divisors (see below), whose sum is σ = 972144000. Its totient is φ = 134918784.

The previous prime is 421045717. The next prime is 421045733. The reversal of 421045722 is 227540124.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 489729 + ... + 490587.

It is an arithmetic number, because the mean of its divisors is an integer number (15189750).

Almost surely, 2^421045722 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 421045722, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (486072000).

421045722 is an abundant number, since it is smaller than the sum of its proper divisors (551098278).

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

421045722 is a wasteful number, since it uses less digits than its factorization.

421045722 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1212 (or 1206 counting only the distinct ones).

The product of its (nonzero) digits is 4480, while the sum is 27.

The square root of 421045722 is about 20519.3986753998. The cubic root of 421045722 is about 749.5082536512.

Adding to 421045722 its reverse (227540124), we get a palindrome (648585846).

The spelling of 421045722 in words is "four hundred twenty-one million, forty-five thousand, seven hundred twenty-two".