1276273213 has 2 divisors, whose sum is σ = 1276273214. Its totient is φ = 1276273212.

The previous prime is 1276273139. The next prime is 1276273237. The reversal of 1276273213 is 3123726721.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1164379129 + 111894084 = 34123^2 + 10578^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1276273213 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1276273913) 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, 638136606 + 638136607.

It is an arithmetic number, because the mean of its divisors is an integer number (638136607).

Almost surely, 2^1276273213 is an apocalyptic number.

It is an amenable number.

1276273213 is a deficient number, since it is larger than the sum of its proper divisors (1).

1276273213 is an equidigital number, since it uses as much as digits as its factorization.

1276273213 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 21168, while the sum is 34.

The square root of 1276273213 is about 35724.9662421114. The cubic root of 1276273213 is about 1084.7122664289.

Adding to 1276273213 its reverse (3123726721), we get a palindrome (4399999934).

The spelling of 1276273213 in words is "one billion, two hundred seventy-six million, two hundred seventy-three thousand, two hundred thirteen".