1311255242 has 48 divisors (see below), whose sum is σ = 2243333664. Its totient is φ = 570024000.

The previous prime is 1311255233. The next prime is 1311255259. The reversal of 1311255242 is 2425521131.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2423492 + ... + 2424032.

It is an arithmetic number, because the mean of its divisors is an integer number (46736118).

Almost surely, 2^1311255242 is an apocalyptic number.

1311255242 is a deficient number, since it is larger than the sum of its proper divisors (932078422).

1311255242 is a wasteful number, since it uses less digits than its factorization.

1311255242 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 743 (or 714 counting only the distinct ones).

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

The square root of 1311255242 is about 36211.2584978760. The cubic root of 1311255242 is about 1094.5335522258.

Adding to 1311255242 its reverse (2425521131), we get a palindrome (3736776373).

The spelling of 1311255242 in words is "one billion, three hundred eleven million, two hundred fifty-five thousand, two hundred forty-two".