1311142 has 24 divisors (see below), whose sum is σ = 2425464. Its totient is φ = 528192.

The previous prime is 1311131. The next prime is 1311143. The reversal of 1311142 is 2411131.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1311143) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1273 + ... + 2059.

It is an arithmetic number, because the mean of its divisors is an integer number (101061).

2^1311142 is an apocalyptic number.

1311142 is a deficient number, since it is larger than the sum of its proper divisors (1114322).

1311142 is a wasteful number, since it uses less digits than its factorization.

1311142 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 820 (or 813 counting only the distinct ones).

The product of its digits is 24, while the sum is 13.

The square root of 1311142 is about 1145.0510905632. The cubic root of 1311142 is about 109.4502042790.

Adding to 1311142 its reverse (2411131), we get a palindrome (3722273).

The spelling of 1311142 in words is "one million, three hundred eleven thousand, one hundred forty-two".