1225312997 has 2 divisors, whose sum is σ = 1225312998. Its totient is φ = 1225312996.

The previous prime is 1225312969. The next prime is 1225313027. The reversal of 1225312997 is 7992135221.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1208674756 + 16638241 = 34766^2 + 4079^2 .

It is a cyclic number.

It is not a de Polignac number, because 1225312997 - 2²⁰ = 1224264421 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1225312397) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 612656498 + 612656499.

It is an arithmetic number, because the mean of its divisors is an integer number (612656499).

Almost surely, 2^1225312997 is an apocalyptic number.

It is an amenable number.

1225312997 is a deficient number, since it is larger than the sum of its proper divisors (1).

1225312997 is an equidigital number, since it uses as much as digits as its factorization.

1225312997 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 68040, while the sum is 41.

The square root of 1225312997 is about 35004.4711001323. The cubic root of 1225312997 is about 1070.0786028378.

The spelling of 1225312997 in words is "one billion, two hundred twenty-five million, three hundred twelve thousand, nine hundred ninety-seven".