1311245522 has 8 divisors (see below), whose sum is σ = 1968195456. Its totient is φ = 655180372.

The previous prime is 1311245521. The next prime is 1311245609. The reversal of 1311245522 is 2255421131.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 1311245491 and 1311245500.

It is not an unprimeable number, because it can be changed into a prime (1311245521) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 217478 + ... + 223425.

It is an arithmetic number, because the mean of its divisors is an integer number (246024432).

Almost surely, 2^1311245522 is an apocalyptic number.

1311245522 is a deficient number, since it is larger than the sum of its proper divisors (656949934).

1311245522 is a wasteful number, since it uses less digits than its factorization.

1311245522 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 442392.

The product of its digits is 2400, while the sum is 26.

The square root of 1311245522 is about 36211.1242852248. The cubic root of 1311245522 is about 1094.5308477199.

Adding to 1311245522 its reverse (2255421131), we get a palindrome (3566666653).

The spelling of 1311245522 in words is "one billion, three hundred eleven million, two hundred forty-five thousand, five hundred twenty-two".