1286330491 has 2 divisors, whose sum is σ = 1286330492. Its totient is φ = 1286330490.

The previous prime is 1286330471. The next prime is 1286330503. The reversal of 1286330491 is 1940336821.

It is a strong prime.

It is an emirp because it is prime and its reverse (1940336821) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1286330491 - 2⁵ = 1286330459 is a prime.

It is a super-2 number, since 2×1286330491² = 3309292264152602162, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1286330491.

It is not a weakly prime, because it can be changed into another prime (1286330471) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 643165245 + 643165246.

It is an arithmetic number, because the mean of its divisors is an integer number (643165246).

Almost surely, 2^1286330491 is an apocalyptic number.

1286330491 is a deficient number, since it is larger than the sum of its proper divisors (1).

1286330491 is an equidigital number, since it uses as much as digits as its factorization.

1286330491 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 31104, while the sum is 37.

The square root of 1286330491 is about 35865.4498229145. The cubic root of 1286330491 is about 1087.5540618036.

It can be divided in two parts, 1286330 and 491, that added together give a palindrome (1286821).

The spelling of 1286330491 in words is "one billion, two hundred eighty-six million, three hundred thirty thousand, four hundred ninety-one".