1327255781 has 2 divisors, whose sum is σ = 1327255782. Its totient is φ = 1327255780.

The previous prime is 1327255757. The next prime is 1327255819. The reversal of 1327255781 is 1875527231.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1025920900 + 301334881 = 32030^2 + 17359^2 .

It is an emirp because it is prime and its reverse (1875527231) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1327255781 - 2²² = 1323061477 is a prime.

It is a super-2 number, since 2×1327255781² = 3523215816395839922, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1327258781) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 663627890 + 663627891.

It is an arithmetic number, because the mean of its divisors is an integer number (663627891).

Almost surely, 2^1327255781 is an apocalyptic number.

It is an amenable number.

1327255781 is a deficient number, since it is larger than the sum of its proper divisors (1).

1327255781 is an equidigital number, since it uses as much as digits as its factorization.

1327255781 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 117600, while the sum is 41.

The square root of 1327255781 is about 36431.5218046131. The cubic root of 1327255781 is about 1098.9675659958.

The spelling of 1327255781 in words is "one billion, three hundred twenty-seven million, two hundred fifty-five thousand, seven hundred eighty-one".