1286284772 has 12 divisors (see below), whose sum is σ = 2293470396. Its totient is φ = 631007520.

The previous prime is 1286284723. The next prime is 1286284789. The reversal of 1286284772 is 2774826821.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 1079385316 + 206899456 = 32854^2 + 14384^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3033479 + ... + 3033902.

It is an arithmetic number, because the mean of its divisors is an integer number (191122533).

Almost surely, 2^1286284772 is an apocalyptic number.

It is an amenable number.

1286284772 is a deficient number, since it is larger than the sum of its proper divisors (1007185624).

1286284772 is a wasteful number, since it uses less digits than its factorization.

1286284772 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6067438 (or 6067436 counting only the distinct ones).

The product of its digits is 602112, while the sum is 47.

The square root of 1286284772 is about 35864.8124489729. The cubic root of 1286284772 is about 1087.5411769673.

The spelling of 1286284772 in words is "one billion, two hundred eighty-six million, two hundred eighty-four thousand, seven hundred seventy-two".