1220022 has 40 divisors (see below), whose sum is σ = 2901096. Its totient is φ = 381888.

The previous prime is 1219991. The next prime is 1220027. The reversal of 1220022 is 2200221.

1220022 = 99² + 100² + ... + 166².

It is a Harshad number since it is a multiple of its sum of digits (9).

It is an Ulam number.

It is a junction number, because it is equal to n+sod(n) for n = 1219986 and 1220013.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1220027) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 2533 + ... + 2975.

2^1220022 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1220022, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1450548).

1220022 is an abundant number, since it is smaller than the sum of its proper divisors (1681074).

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

1220022 is a wasteful number, since it uses less digits than its factorization.

1220022 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 474 (or 465 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 9.

The square root of 1220022 is about 1104.5460606059. The cubic root of 1220022 is about 106.8536152967.

Adding to 1220022 its reverse (2200221), we get a palindrome (3420243).

The spelling of 1220022 in words is "one million, two hundred twenty thousand, twenty-two".