1158222 has 32 divisors (see below), whose sum is σ = 2580480. Its totient is φ = 344160.

The previous prime is 1158217. The next prime is 1158247. The reversal of 1158222 is 2228511.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2179 + ... + 2657.

It is an arithmetic number, because the mean of its divisors is an integer number (80640).

2^1158222 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1158222, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1290240).

1158222 is an abundant number, since it is smaller than the sum of its proper divisors (1422258).

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

1158222 is a wasteful number, since it uses less digits than its factorization.

1158222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 528.

The product of its digits is 320, while the sum is 21.

The square root of 1158222 is about 1076.2072291153. The cubic root of 1158222 is about 105.0180467847.

The spelling of 1158222 in words is "one million, one hundred fifty-eight thousand, two hundred twenty-two".