1286486491 has 4 divisors (see below), whose sum is σ = 1313858592. Its totient is φ = 1259114392.

The previous prime is 1286486483. The next prime is 1286486501. The reversal of 1286486491 is 1946846821.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 1286486491 - 2³ = 1286486483 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1286486431) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13685980 + ... + 13686073.

It is an arithmetic number, because the mean of its divisors is an integer number (328464648).

Almost surely, 2^1286486491 is an apocalyptic number.

1286486491 is a deficient number, since it is larger than the sum of its proper divisors (27372101).

1286486491 is an equidigital number, since it uses as much as digits as its factorization.

1286486491 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27372100.

The product of its digits is 663552, while the sum is 49.

The square root of 1286486491 is about 35867.6245519549. The cubic root of 1286486491 is about 1087.5980244754.

The spelling of 1286486491 in words is "one billion, two hundred eighty-six million, four hundred eighty-six thousand, four hundred ninety-one".