1222109 has 10 divisors (see below), whose sum is σ = 1428510. Its totient is φ = 1045464.

The previous prime is 1222097. The next prime is 1222129. The reversal of 1222109 is 9012221.

It can be written as a sum of positive squares in only one way, i.e., 1162084 + 60025 = 1078^2 + 245^2 .

It is not a de Polignac number, because 1222109 - 2⁸ = 1221853 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1222129) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 2147 + ... + 2655.

It is an arithmetic number, because the mean of its divisors is an integer number (142851).

2^1222109 is an apocalyptic number.

It is an amenable number.

1222109 is a deficient number, since it is larger than the sum of its proper divisors (206401).

1222109 is an frugal number, since it uses more digits than its factorization.

1222109 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 537 (or 516 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 17.

The square root of 1222109 is about 1105.4903889225. The cubic root of 1222109 is about 106.9145094055.

It can be divided in two parts, 1222 and 109, that added together give a palindrome (1331).

The spelling of 1222109 in words is "one million, two hundred twenty-two thousand, one hundred nine".