1222180 has 24 divisors (see below), whose sum is σ = 2617272. Its totient is φ = 479232.

The previous prime is 1222171. The next prime is 1222187. The reversal of 1222180 is 812221.

It can be written as a sum of positive squares in 4 ways, for example, as 379456 + 842724 = 616^2 + 918^2 .

It is not an unprimeable number, because it can be changed into a prime (1222187) 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, 484 + ... + 1636.

It is an arithmetic number, because the mean of its divisors is an integer number (109053).

2^1222180 is an apocalyptic number.

1222180 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1222180 is an abundant number, since it is smaller than the sum of its proper divisors (1395092).

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

1222180 is a wasteful number, since it uses less digits than its factorization.

1222180 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1215 (or 1213 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 16.

The square root of 1222180 is about 1105.5225009017. The cubic root of 1222180 is about 106.9165798109.

The spelling of 1222180 in words is "one million, two hundred twenty-two thousand, one hundred eighty".