1222389 has 12 divisors (see below), whose sum is σ = 2018016. Its totient is φ = 698472.

The previous prime is 1222373. The next prime is 1222393. The reversal of 1222389 is 9832221.

It is a happy number.

It is not a de Polignac number, because 1222389 - 2⁴ = 1222373 is a prime.

It is a hoax number, since the sum of its digits (27) coincides with the sum of the digits of its distinct prime factors.

It is a plaindrome in base 10.

It is a nialpdrome in base 11.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1222789) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 9639 + ... + 9764.

It is an arithmetic number, because the mean of its divisors is an integer number (168168).

2^1222389 is an apocalyptic number.

It is an amenable number.

1222389 is a deficient number, since it is larger than the sum of its proper divisors (795627).

1222389 is a wasteful number, since it uses less digits than its factorization.

1222389 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19416 (or 19413 counting only the distinct ones).

The product of its digits is 1728, while the sum is 27.

The square root of 1222389 is about 1105.6170223002. The cubic root of 1222389 is about 106.9226739191.

The spelling of 1222389 in words is "one million, two hundred twenty-two thousand, three hundred eighty-nine".