1276230491 has 2 divisors, whose sum is σ = 1276230492. Its totient is φ = 1276230490.

The previous prime is 1276230481. The next prime is 1276230517. The reversal of 1276230491 is 1940326721.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1276230491 is a prime.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (1276230421) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 638115245 + 638115246.

It is an arithmetic number, because the mean of its divisors is an integer number (638115246).

Almost surely, 2^1276230491 is an apocalyptic number.

1276230491 is a deficient number, since it is larger than the sum of its proper divisors (1).

1276230491 is an equidigital number, since it uses as much as digits as its factorization.

1276230491 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 18144, while the sum is 35.

The square root of 1276230491 is about 35724.3683079211. The cubic root of 1276230491 is about 1084.7001630658.

It can be divided in two parts, 1276230 and 491, that added together give a palindrome (1276721).

The spelling of 1276230491 in words is "one billion, two hundred seventy-six million, two hundred thirty thousand, four hundred ninety-one".