1222089 has 16 divisors (see below), whose sum is σ = 1840320. Its totient is φ = 714560.

The previous prime is 1222063. The next prime is 1222097. The reversal of 1222089 is 9802221.

It is not a de Polignac number, because 1222089 - 2⁵ = 1222057 is a prime.

It is an Ulam number.

It is not an unprimeable number, because it can be changed into a prime (1222019) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 319 + ... + 1595.

It is an arithmetic number, because the mean of its divisors is an integer number (115020).

2^1222089 is an apocalyptic number.

It is an amenable number.

1222089 is a deficient number, since it is larger than the sum of its proper divisors (618231).

1222089 is a wasteful number, since it uses less digits than its factorization.

1222089 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1320.

The product of its (nonzero) digits is 576, while the sum is 24.

The square root of 1222089 is about 1105.4813431262. The cubic root of 1222089 is about 106.9139261782.

It can be divided in two parts, 122 and 2089, that added together give a triangular number (2211 = T₆₆).

The spelling of 1222089 in words is "one million, two hundred twenty-two thousand, eighty-nine".