1311241242 has 16 divisors (see below), whose sum is σ = 2632689792. Its totient is φ = 435379200.

The previous prime is 1311241241. The next prime is 1311241249. The reversal of 1311241242 is 2421421131.

1311241242 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (1311241241) 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, 423634 + ... + 426717.

It is an arithmetic number, because the mean of its divisors is an integer number (164543112).

Almost surely, 2^1311241242 is an apocalyptic number.

1311241242 is an abundant number, since it is smaller than the sum of its proper divisors (1321448550).

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

1311241242 is a wasteful number, since it uses less digits than its factorization.

1311241242 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 850613.

The product of its digits is 384, while the sum is 21.

The square root of 1311241242 is about 36211.0651873153. The cubic root of 1311241242 is about 1094.5296568427.

Adding to 1311241242 its reverse (2421421131), we get a palindrome (3732662373).

The spelling of 1311241242 in words is "one billion, three hundred eleven million, two hundred forty-one thousand, two hundred forty-two".