1312562497 has 2 divisors, whose sum is σ = 1312562498. Its totient is φ = 1312562496.

The previous prime is 1312562453. The next prime is 1312562507. The reversal of 1312562497 is 7942652131.

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., 1099519281 + 213043216 = 33159^2 + 14596^2 .

It is a cyclic number.

It is not a de Polignac number, because 1312562497 - 2⁷ = 1312562369 is a prime.

It is not a weakly prime, because it can be changed into another prime (1312512497) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 656281248 + 656281249.

It is an arithmetic number, because the mean of its divisors is an integer number (656281249).

Almost surely, 2^1312562497 is an apocalyptic number.

It is an amenable number.

1312562497 is a deficient number, since it is larger than the sum of its proper divisors (1).

1312562497 is an equidigital number, since it uses as much as digits as its factorization.

1312562497 is an evil number, because the sum of its binary digits is even.

The product of its digits is 90720, while the sum is 40.

The square root of 1312562497 is about 36229.3043957512. The cubic root of 1312562497 is about 1094.8971629062.

The spelling of 1312562497 in words is "one billion, three hundred twelve million, five hundred sixty-two thousand, four hundred ninety-seven".