1276315373 has 2 divisors, whose sum is σ = 1276315374. Its totient is φ = 1276315372.

The previous prime is 1276315357. The next prime is 1276315387. The reversal of 1276315373 is 3735136721.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1272848329 + 3467044 = 35677^2 + 1862^2 .

It is an emirp because it is prime and its reverse (3735136721) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1276315373 - 2⁴ = 1276315357 is a prime.

It is a super-2 number, since 2×1276315373² = 3257961862712258258, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1276315303) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 638157686 + 638157687.

It is an arithmetic number, because the mean of its divisors is an integer number (638157687).

Almost surely, 2^1276315373 is an apocalyptic number.

It is an amenable number.

1276315373 is a deficient number, since it is larger than the sum of its proper divisors (1).

1276315373 is an equidigital number, since it uses as much as digits as its factorization.

1276315373 is an evil number, because the sum of its binary digits is even.

The product of its digits is 79380, while the sum is 38.

The square root of 1276315373 is about 35725.5563007772. The cubic root of 1276315373 is about 1084.7242103098.

The spelling of 1276315373 in words is "one billion, two hundred seventy-six million, three hundred fifteen thousand, three hundred seventy-three".