1322135243 has 16 divisors (see below), whose sum is σ = 1620815616. Its totient is φ = 1061243040.

The previous prime is 1322135179. The next prime is 1322135257. The reversal of 1322135243 is 3425312231.

It is a happy number.

It is not a de Polignac number, because 1322135243 - 2⁶ = 1322135179 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1322135443) 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, 197705 + ... + 204282.

It is an arithmetic number, because the mean of its divisors is an integer number (101300976).

Almost surely, 2^1322135243 is an apocalyptic number.

1322135243 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

1322135243 is a deficient number, since it is larger than the sum of its proper divisors (298680373).

1322135243 is a wasteful number, since it uses less digits than its factorization.

1322135243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 402034.

The product of its digits is 4320, while the sum is 26.

The square root of 1322135243 is about 36361.1776899484. The cubic root of 1322135243 is about 1097.5524764284.

Adding to 1322135243 its reverse (3425312231), we get a palindrome (4747447474).

The spelling of 1322135243 in words is "one billion, three hundred twenty-two million, one hundred thirty-five thousand, two hundred forty-three".