1311124142 has 4 divisors (see below), whose sum is σ = 1966686216. Its totient is φ = 655562070.

The previous prime is 1311124141. The next prime is 1311124147. The reversal of 1311124142 is 2414211131.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1311124141) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 327781034 + ... + 327781037.

It is an arithmetic number, because the mean of its divisors is an integer number (491671554).

Almost surely, 2^1311124142 is an apocalyptic number.

1311124142 is a deficient number, since it is larger than the sum of its proper divisors (655562074).

1311124142 is an equidigital number, since it uses as much as digits as its factorization.

1311124142 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 655562073.

The product of its digits is 192, while the sum is 20.

The square root of 1311124142 is about 36209.4482421370. The cubic root of 1311124142 is about 1094.4970736601.

Adding to 1311124142 its reverse (2414211131), we get a palindrome (3725335273).

The spelling of 1311124142 in words is "one billion, three hundred eleven million, one hundred twenty-four thousand, one hundred forty-two".