1276808801 has 2 divisors, whose sum is σ = 1276808802. Its totient is φ = 1276808800.

The previous prime is 1276808789. The next prime is 1276808803. The reversal of 1276808801 is 1088086721.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 832611025 + 444197776 = 28855^2 + 21076^2 .

It is an emirp because it is prime and its reverse (1088086721) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1276808801 is a prime.

It is a super-2 number, since 2×1276808801² = 3260481428622115202, which contains 22 as substring.

Together with 1276808803, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (1276808803) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 638404400 + 638404401.

It is an arithmetic number, because the mean of its divisors is an integer number (638404401).

Almost surely, 2^1276808801 is an apocalyptic number.

It is an amenable number.

1276808801 is a deficient number, since it is larger than the sum of its proper divisors (1).

1276808801 is an equidigital number, since it uses as much as digits as its factorization.

1276808801 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 43008, while the sum is 41.

The square root of 1276808801 is about 35732.4614461417. The cubic root of 1276808801 is about 1084.8639783612.

The spelling of 1276808801 in words is "one billion, two hundred seventy-six million, eight hundred eight thousand, eight hundred one".