1311042 has 16 divisors (see below), whose sum is σ = 2633760. Its totient is φ = 435072.

The previous prime is 1311031. The next prime is 1311043. The reversal of 1311042 is 2401131.

It is a happy number.

It is a super-2 number, since 2×1311042² = 3437662251528, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1311043) 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, 1809 + ... + 2427.

It is an arithmetic number, because the mean of its divisors is an integer number (164610).

2^1311042 is an apocalyptic number.

1311042 is an abundant number, since it is smaller than the sum of its proper divisors (1322718).

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

1311042 is a wasteful number, since it uses less digits than its factorization.

1311042 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 977.

The product of its (nonzero) digits is 24, while the sum is 12.

The square root of 1311042 is about 1145.0074235567. The cubic root of 1311042 is about 109.4474216415.

Adding to 1311042 its reverse (2401131), we get a palindrome (3712173).

The spelling of 1311042 in words is "one million, three hundred eleven thousand, forty-two".