1311013042 has 4 divisors (see below), whose sum is σ = 1966519566. Its totient is φ = 655506520.

The previous prime is 1311012973. The next prime is 1311013049. The reversal of 1311013042 is 2403101131.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 922883641 + 388129401 = 30379^2 + 19701^2 .

It is not an unprimeable number, because it can be changed into a prime (1311013049) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 327753259 + ... + 327753262.

Almost surely, 2^1311013042 is an apocalyptic number.

1311013042 is a deficient number, since it is larger than the sum of its proper divisors (655506524).

1311013042 is an equidigital number, since it uses as much as digits as its factorization.

1311013042 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 655506523.

The product of its (nonzero) digits is 72, while the sum is 16.

The square root of 1311013042 is about 36207.9140796594. The cubic root of 1311013042 is about 1094.4661581895.

Adding to 1311013042 its reverse (2403101131), we get a palindrome (3714114173).

The spelling of 1311013042 in words is "one billion, three hundred eleven million, thirteen thousand, forty-two".