1225313717 has 2 divisors, whose sum is σ = 1225313718. Its totient is φ = 1225313716.

The previous prime is 1225313689. The next prime is 1225313729. The reversal of 1225313717 is 7173135221.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1188456676 + 36857041 = 34474^2 + 6071^2 .

It is a cyclic number.

It is not a de Polignac number, because 1225313717 - 2⁸ = 1225313461 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1225363717) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 612656858 + 612656859.

It is an arithmetic number, because the mean of its divisors is an integer number (612656859).

Almost surely, 2^1225313717 is an apocalyptic number.

It is an amenable number.

1225313717 is a deficient number, since it is larger than the sum of its proper divisors (1).

1225313717 is an equidigital number, since it uses as much as digits as its factorization.

1225313717 is an evil number, because the sum of its binary digits is even.

The product of its digits is 8820, while the sum is 32.

The square root of 1225313717 is about 35004.4813845313. The cubic root of 1225313717 is about 1070.0788124322.

Adding to 1225313717 its reverse (7173135221), we get a palindrome (8398448938).

The spelling of 1225313717 in words is "one billion, two hundred twenty-five million, three hundred thirteen thousand, seven hundred seventeen".