422172 has 30 divisors (see below), whose sum is σ = 1104488. Its totient is φ = 140616.

The previous prime is 422141. The next prime is 422183. The reversal of 422172 is 271224.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is an unprimeable number.

422172 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 9 ways as a sum of consecutive naturals, for example, 328 + ... + 975.

2⁴²²¹⁷² is an apocalyptic number.

It is an amenable number.

422172 is an abundant number, since it is smaller than the sum of its proper divisors (682316).

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

422172 is a wasteful number, since it uses less digits than its factorization.

422172 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1319 (or 1308 counting only the distinct ones).

The product of its digits is 224, while the sum is 18.

The square root of 422172 is about 649.7476433201. The cubic root of 422172 is about 75.0175958715.

Adding to 422172 its reverse (271224), we get a palindrome (693396).

It can be divided in two parts, 4 and 22172, that multiplied together give a palindrome (88688).

The spelling of 422172 in words is "four hundred twenty-two thousand, one hundred seventy-two", and thus it is an iban number.