1222722 has 16 divisors (see below), whose sum is σ = 2717280. Its totient is φ = 407556.

The previous prime is 1222717. The next prime is 1222723. The reversal of 1222722 is 2272221.

It is a happy number.

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

It is a junction number, because it is equal to n+sod(n) for n = 1222695 and 1222704.

It is not an unprimeable number, because it can be changed into a prime (1222723) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11268 + ... + 11375.

It is an arithmetic number, because the mean of its divisors is an integer number (169830).

2^1222722 is an apocalyptic number.

1222722 is an abundant number, since it is smaller than the sum of its proper divisors (1494558).

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

1222722 is a wasteful number, since it uses less digits than its factorization.

1222722 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22654 (or 22648 counting only the distinct ones).

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

The square root of 1222722 is about 1105.7676066878. The cubic root of 1222722 is about 106.9323822356.

Adding to 1222722 its reverse (2272221), we get a palindrome (3494943).

The spelling of 1222722 in words is "one million, two hundred twenty-two thousand, seven hundred twenty-two".