1326742757 has 2 divisors, whose sum is σ = 1326742758. Its totient is φ = 1326742756.

The previous prime is 1326742733. The next prime is 1326742759. The reversal of 1326742757 is 7572476231.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1112822881 + 213919876 = 33359^2 + 14626^2 .

It is a cyclic number.

It is not a de Polignac number, because 1326742757 - 2¹⁰ = 1326741733 is a prime.

It is a super-2 number, since 2×1326742757² = 3520492686503922098, which contains 22 as substring.

Together with 1326742759, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1326742759) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 663371378 + 663371379.

It is an arithmetic number, because the mean of its divisors is an integer number (663371379).

Almost surely, 2^1326742757 is an apocalyptic number.

It is an amenable number.

1326742757 is a deficient number, since it is larger than the sum of its proper divisors (1).

1326742757 is an equidigital number, since it uses as much as digits as its factorization.

1326742757 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 493920, while the sum is 44.

The square root of 1326742757 is about 36424.4801884667. The cubic root of 1326742757 is about 1098.8259531528.

The spelling of 1326742757 in words is "one billion, three hundred twenty-six million, seven hundred forty-two thousand, seven hundred fifty-seven".