1311042142 has 48 divisors (see below), whose sum is σ = 2270522880. Its totient is φ = 565488000.

The previous prime is 1311042119. The next prime is 1311042143. The reversal of 1311042142 is 2412401131.

It is a Harshad number since it is a multiple of its sum of digits (19).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1311042143) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 338517 + ... + 342367.

It is an arithmetic number, because the mean of its divisors is an integer number (47302560).

Almost surely, 2^1311042142 is an apocalyptic number.

1311042142 is a deficient number, since it is larger than the sum of its proper divisors (959480738).

1311042142 is a wasteful number, since it uses less digits than its factorization.

1311042142 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3937 (or 3920 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 19.

The square root of 1311042142 is about 36208.3159232793. The cubic root of 1311042142 is about 1094.4742559299.

Adding to 1311042142 its reverse (2412401131), we get a palindrome (3723443273).

The spelling of 1311042142 in words is "one billion, three hundred eleven million, forty-two thousand, one hundred forty-two".