1311242344 has 32 divisors (see below), whose sum is σ = 2534209920. Its totient is φ = 635677056.

The previous prime is 1311242341. The next prime is 1311242353. The reversal of 1311242344 is 4432421131.

It is a super-2 number, since 2×1311242344² = 3438712969397228672, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1311242341) 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, 33217 + ... + 61039.

It is an arithmetic number, because the mean of its divisors is an integer number (79194060).

Almost surely, 2^1311242344 is an apocalyptic number.

It is an amenable number.

1311242344 is a deficient number, since it is larger than the sum of its proper divisors (1222967576).

1311242344 is a wasteful number, since it uses less digits than its factorization.

1311242344 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28009 (or 28005 counting only the distinct ones).

The product of its digits is 2304, while the sum is 25.

The square root of 1311242344 is about 36211.0804036555. The cubic root of 1311242344 is about 1094.5299634660.

Adding to 1311242344 its reverse (4432421131), we get a palindrome (5743663475).

The spelling of 1311242344 in words is "one billion, three hundred eleven million, two hundred forty-two thousand, three hundred forty-four".