1311242442 has 16 divisors (see below), whose sum is σ = 2635665600. Its totient is φ = 434884032.

The previous prime is 1311242431. The next prime is 1311242467. The reversal of 1311242442 is 2442421131.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 547903 + ... + 550290.

It is an arithmetic number, because the mean of its divisors is an integer number (164729100).

Almost surely, 2^1311242442 is an apocalyptic number.

1311242442 is an abundant number, since it is smaller than the sum of its proper divisors (1324423158).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1311242442 is a wasteful number, since it uses less digits than its factorization.

1311242442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1098397.

The product of its digits is 1536, while the sum is 24.

The square root of 1311242442 is about 36211.0817568324. The cubic root of 1311242442 is about 1094.5299907338.

Adding to 1311242442 its reverse (2442421131), we get a palindrome (3753663573).

Subtracting 1311242442 from its reverse (2442421131), we obtain a square (1131178689 = 33633²).

The spelling of 1311242442 in words is "one billion, three hundred eleven million, two hundred forty-two thousand, four hundred forty-two".