1222170 has 16 divisors (see below), whose sum is σ = 2933280. Its totient is φ = 325904.

The previous prime is 1222159. The next prime is 1222171. The reversal of 1222170 is 712221.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1222171) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 20340 + ... + 20399.

It is an arithmetic number, because the mean of its divisors is an integer number (183330).

2^1222170 is an apocalyptic number.

1222170 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1222170 is an abundant number, since it is smaller than the sum of its proper divisors (1711110).

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

1222170 is a wasteful number, since it uses less digits than its factorization.

1222170 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40749.

The product of its (nonzero) digits is 56, while the sum is 15.

The square root of 1222170 is about 1105.5179781442. The cubic root of 1222170 is about 106.9162882093.

Adding to 1222170 its reverse (712221), we get a palindrome (1934391).

The spelling of 1222170 in words is "one million, two hundred twenty-two thousand, one hundred seventy".