421122172 has 24 divisors (see below), whose sum is σ = 742818384. Its totient is φ = 208895232.

The previous prime is 421122167. The next prime is 421122187. The reversal of 421122172 is 271221124.

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, 430548 + ... + 431524.

It is an arithmetic number, because the mean of its divisors is an integer number (30950766).

Almost surely, 2^421122172 is an apocalyptic number.

It is an amenable number.

421122172 is a deficient number, since it is larger than the sum of its proper divisors (321696212).

421122172 is a wasteful number, since it uses less digits than its factorization.

421122172 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1725 (or 1723 counting only the distinct ones).

The product of its digits is 448, while the sum is 22.

The square root of 421122172 is about 20521.2614622006. The cubic root of 421122172 is about 749.5536140759.

Adding to 421122172 its reverse (271221124), we get a palindrome (692343296).

The spelling of 421122172 in words is "four hundred twenty-one million, one hundred twenty-two thousand, one hundred seventy-two".