4022172 has 72 divisors (see below), whose sum is σ = 12684672. Its totient is φ = 1044000.

The previous prime is 4022153. The next prime is 4022173. The reversal of 4022172 is 2712204.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4022173) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2047 + ... + 3497.

It is an arithmetic number, because the mean of its divisors is an integer number (176176).

Almost surely, 2^4022172 is an apocalyptic number.

4022172 is a gapful number since it is divisible by the number (42) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 4022172, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (6342336).

4022172 is an abundant number, since it is smaller than the sum of its proper divisors (8662500).

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

4022172 is a wasteful number, since it uses less digits than its factorization.

4022172 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1479 (or 1474 counting only the distinct ones).

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

The square root of 4022172 is about 2005.5353400028. The cubic root of 4022172 is about 159.0328637421.

Adding to 4022172 its reverse (2712204), we get a palindrome (6734376).

The spelling of 4022172 in words is "four million, twenty-two thousand, one hundred seventy-two".