1356222 has 32 divisors (see below), whose sum is σ = 3168000. Its totient is φ = 386904.

The previous prime is 1356221. The next prime is 1356227. The reversal of 1356222 is 2226531.

It is a super-2 number, since 2×1356222² = 3678676226568, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1356221) 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, 1729 + ... + 2387.

It is an arithmetic number, because the mean of its divisors is an integer number (99000).

2^1356222 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1356222, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1584000).

1356222 is an abundant number, since it is smaller than the sum of its proper divisors (1811778).

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

1356222 is an equidigital number, since it uses as much as digits as its factorization.

1356222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 685 (or 671 counting only the distinct ones).

The product of its digits is 720, while the sum is 21.

The square root of 1356222 is about 1164.5694483370. The cubic root of 1356222 is about 110.6904776912.

The spelling of 1356222 in words is "one million, three hundred fifty-six thousand, two hundred twenty-two".