1311143146 has 16 divisors (see below), whose sum is σ = 2071157760. Its totient is φ = 620788320.

The previous prime is 1311143101. The next prime is 1311143159. The reversal of 1311143146 is 6413411131.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 1311143146.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 95686 + ... + 108526.

It is an arithmetic number, because the mean of its divisors is an integer number (129447360).

Almost surely, 2^1311143146 is an apocalyptic number.

1311143146 is a deficient number, since it is larger than the sum of its proper divisors (760014614).

1311143146 is a wasteful number, since it uses less digits than its factorization.

1311143146 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15549.

The product of its digits is 864, while the sum is 25.

The square root of 1311143146 is about 36209.7106588827. The cubic root of 1311143146 is about 1094.5023616725.

Adding to 1311143146 its reverse (6413411131), we get a palindrome (7724554277).

The spelling of 1311143146 in words is "one billion, three hundred eleven million, one hundred forty-three thousand, one hundred forty-six".