1220922 has 12 divisors (see below), whose sum is σ = 2645370. Its totient is φ = 406968.

The previous prime is 1220917. The next prime is 1220927. The reversal of 1220922 is 2290221.

It is an interprime number because it is at equal distance from previous prime (1220917) and next prime (1220927).

It can be written as a sum of positive squares in only one way, i.e., 938961 + 281961 = 969^2 + 531^2 .

It is a Harshad number since it is a multiple of its sum of digits (18), and also a Moran number because the ratio is a prime number: 67829 = 1220922 / (1 + 2 + 2 + 0 + 9 + 2 + 2).

It is a junction number, because it is equal to n+sod(n) for n = 1220895 and 1220904.

It is not an unprimeable number, because it can be changed into a prime (1220927) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 33897 + ... + 33932.

2^1220922 is an apocalyptic number.

1220922 is an abundant number, since it is smaller than the sum of its proper divisors (1424448).

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

1220922 is a wasteful number, since it uses less digits than its factorization.

1220922 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 67837 (or 67834 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

The square root of 1220922 is about 1104.9533926822. The cubic root of 1220922 is about 106.8798838437.

The spelling of 1220922 in words is "one million, two hundred twenty thousand, nine hundred twenty-two".