1316251361 has 2 divisors, whose sum is σ = 1316251362. Its totient is φ = 1316251360.

The previous prime is 1316251301. The next prime is 1316251379. The reversal of 1316251361 is 1631526131.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1090320400 + 225930961 = 33020^2 + 15031^2 .

It is a cyclic number.

It is not a de Polignac number, because 1316251361 - 2¹⁰ = 1316250337 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (1316251301) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 658125680 + 658125681.

It is an arithmetic number, because the mean of its divisors is an integer number (658125681).

Almost surely, 2^1316251361 is an apocalyptic number.

It is an amenable number.

1316251361 is a deficient number, since it is larger than the sum of its proper divisors (1).

1316251361 is an equidigital number, since it uses as much as digits as its factorization.

1316251361 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3240, while the sum is 29.

The square root of 1316251361 is about 36280.1786241468. The cubic root of 1316251361 is about 1095.9219138362.

Adding to 1316251361 its reverse (1631526131), we get a palindrome (2947777492).

The spelling of 1316251361 in words is "one billion, three hundred sixteen million, two hundred fifty-one thousand, three hundred sixty-one".