1311222 has 16 divisors (see below), whose sum is σ = 2860992. Its totient is φ = 397320.

The previous prime is 1311217. The next prime is 1311223. The reversal of 1311222 is 2221131.

It is a nude number because it is divisible by every one of its digits.

It is a d-powerful number, because it can be written as 1 + 3⁵ + 1 + 1 + 2⁸ + 2¹⁸ + 2²⁰ .

It is a junction number, because it is equal to n+sod(n) for n = 1311198 and 1311207.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1311223) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9868 + ... + 9999.

It is an arithmetic number, because the mean of its divisors is an integer number (178812).

2^1311222 is an apocalyptic number.

1311222 is an abundant number, since it is smaller than the sum of its proper divisors (1549770).

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

1311222 is a wasteful number, since it uses less digits than its factorization.

1311222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19883.

The product of its digits is 24, while the sum is 12.

The square root of 1311222 is about 1145.0860229695. The cubic root of 1311222 is about 109.4524302872.

Adding to 1311222 its reverse (2221131), we get a palindrome (3532353).

Subtracting 1311222 from its reverse (2221131), we obtain a palindrome (909909).

The spelling of 1311222 in words is "one million, three hundred eleven thousand, two hundred twenty-two".