6172220 has 24 divisors (see below), whose sum is σ = 13264944. Its totient is φ = 2411136.

The previous prime is 6172217. The next prime is 6172247. The reversal of 6172220 is 222716.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 6172192 and 6172201.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2729 + ... + 4448.

It is an arithmetic number, because the mean of its divisors is an integer number (552706).

Almost surely, 2^6172220 is an apocalyptic number.

It is an amenable number.

6172220 is an abundant number, since it is smaller than the sum of its proper divisors (7092724).

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

6172220 is a wasteful number, since it uses less digits than its factorization.

6172220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7229 (or 7227 counting only the distinct ones).

The product of its (nonzero) digits is 336, while the sum is 20.

The square root of 6172220 is about 2484.3952986592. The cubic root of 6172220 is about 183.4342658181.

Adding to 6172220 its reverse (222716), we get a palindrome (6394936).

The spelling of 6172220 in words is "six million, one hundred seventy-two thousand, two hundred twenty".