1286966491 has 8 divisors (see below), whose sum is σ = 1296486000. Its totient is φ = 1277459040.

The previous prime is 1286966423. The next prime is 1286966531. The reversal of 1286966491 is 1946696821.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1286966491 - 2¹⁵ = 1286933723 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1286964491) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 424780 + ... + 427798.

It is an arithmetic number, because the mean of its divisors is an integer number (162060750).

Almost surely, 2^1286966491 is an apocalyptic number.

1286966491 is a deficient number, since it is larger than the sum of its proper divisors (9519509).

1286966491 is a wasteful number, since it uses less digits than its factorization.

1286966491 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6029.

The product of its digits is 1119744, while the sum is 52.

The square root of 1286966491 is about 35874.3151990390. The cubic root of 1286966491 is about 1087.7332719477.

The spelling of 1286966491 in words is "one billion, two hundred eighty-six million, nine hundred sixty-six thousand, four hundred ninety-one".