1286142812 has 12 divisors (see below), whose sum is σ = 2262535296. Its totient is φ = 639704160.

The previous prime is 1286142797. The next prime is 1286142821. The reversal of 1286142812 is 2182416821.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 840953 + ... + 842480.

It is an arithmetic number, because the mean of its divisors is an integer number (188544608).

Almost surely, 2^1286142812 is an apocalyptic number.

It is an amenable number.

1286142812 is a deficient number, since it is larger than the sum of its proper divisors (976392484).

1286142812 is a wasteful number, since it uses less digits than its factorization.

1286142812 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1683628 (or 1683626 counting only the distinct ones).

The product of its digits is 12288, while the sum is 35.

The square root of 1286142812 is about 35862.8332957674. The cubic root of 1286142812 is about 1087.5011668988.

The spelling of 1286142812 in words is "one billion, two hundred eighty-six million, one hundred forty-two thousand, eight hundred twelve".