421172 has 12 divisors (see below), whose sum is σ = 747936. Its totient is φ = 207480.

The previous prime is 421163. The next prime is 421177. The reversal of 421172 is 271124.

It is a self number, because there is not a number n which added to its sum of digits gives 421172.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (421177) by changing a digit.

421172 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 458 + ... + 1025.

It is an arithmetic number, because the mean of its divisors is an integer number (62328).

2⁴²¹¹⁷² is an apocalyptic number.

It is an amenable number.

421172 is a deficient number, since it is larger than the sum of its proper divisors (326764).

421172 is a wasteful number, since it uses less digits than its factorization.

421172 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1558 (or 1556 counting only the distinct ones).

The product of its digits is 112, while the sum is 17.

The square root of 421172 is about 648.9776575507. The cubic root of 421172 is about 74.9583175794.

Adding to 421172 its reverse (271124), we get a palindrome (692296).

The spelling of 421172 in words is "four hundred twenty-one thousand, one hundred seventy-two", and thus it is an iban number.