1311245524 has 12 divisors (see below), whose sum is σ = 2304789984. Its totient is φ = 652734104.

The previous prime is 1311245521. The next prime is 1311245609. The reversal of 1311245524 is 4255421131.

It is a junction number, because it is equal to n+sod(n) for n = 1311245492 and 1311245501.

It is a congruent number.

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, 721144 + ... + 722959.

It is an arithmetic number, because the mean of its divisors is an integer number (192065832).

Almost surely, 2^1311245524 is an apocalyptic number.

It is an amenable number.

1311245524 is a deficient number, since it is larger than the sum of its proper divisors (993544460).

1311245524 is a wasteful number, since it uses less digits than its factorization.

1311245524 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1444334 (or 1444332 counting only the distinct ones).

The product of its digits is 4800, while the sum is 28.

The square root of 1311245524 is about 36211.1243128407. The cubic root of 1311245524 is about 1094.5308482764.

Adding to 1311245524 its reverse (4255421131), we get a palindrome (5566666655).

The spelling of 1311245524 in words is "one billion, three hundred eleven million, two hundred forty-five thousand, five hundred twenty-four".