1245361913 has 2 divisors, whose sum is σ = 1245361914. Its totient is φ = 1245361912.

The previous prime is 1245361883. The next prime is 1245361927. The reversal of 1245361913 is 3191635421.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1185562624 + 59799289 = 34432^2 + 7733^2 .

It is a cyclic number.

It is not a de Polignac number, because 1245361913 - 2¹⁰ = 1245360889 is a prime.

It is not a weakly prime, because it can be changed into another prime (1245301913) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 622680956 + 622680957.

It is an arithmetic number, because the mean of its divisors is an integer number (622680957).

Almost surely, 2^1245361913 is an apocalyptic number.

It is an amenable number.

1245361913 is a deficient number, since it is larger than the sum of its proper divisors (1).

1245361913 is an equidigital number, since it uses as much as digits as its factorization.

1245361913 is an evil number, because the sum of its binary digits is even.

The product of its digits is 19440, while the sum is 35.

The square root of 1245361913 is about 35289.6856460921. The cubic root of 1245361913 is about 1075.8833663535.

The spelling of 1245361913 in words is "one billion, two hundred forty-five million, three hundred sixty-one thousand, nine hundred thirteen".