1311242 has 16 divisors (see below), whose sum is σ = 2048640. Its totient is φ = 628992.

The previous prime is 1311241. The next prime is 1311251. The reversal of 1311242 is 2421131.

It is not an unprimeable number, because it can be changed into a prime (1311241) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (5) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6698 + ... + 6890.

It is an arithmetic number, because the mean of its divisors is an integer number (128040).

2^1311242 is an apocalyptic number.

1311242 is a deficient number, since it is larger than the sum of its proper divisors (737398).

1311242 is a wasteful number, since it uses less digits than its factorization.

1311242 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 317.

The product of its digits is 48, while the sum is 14.

The square root of 1311242 is about 1145.0947559045. The cubic root of 1311242 is about 109.4529867751.

Adding to 1311242 its reverse (2421131), we get a palindrome (3732373).

The spelling of 1311242 in words is "one million, three hundred eleven thousand, two hundred forty-two".