1225565699 has 2 divisors, whose sum is σ = 1225565700. Its totient is φ = 1225565698.

The previous prime is 1225565669. The next prime is 1225565713. The reversal of 1225565699 is 9965655221.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1225565699 is a prime.

It is a super-2 number, since 2×1225565699² = 3004022565130717202, which contains 22 as substring.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (1225565639) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 612782849 + 612782850.

It is an arithmetic number, because the mean of its divisors is an integer number (612782850).

Almost surely, 2^1225565699 is an apocalyptic number.

1225565699 is a deficient number, since it is larger than the sum of its proper divisors (1).

1225565699 is an equidigital number, since it uses as much as digits as its factorization.

1225565699 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1458000, while the sum is 50.

The square root of 1225565699 is about 35008.0804815117. The cubic root of 1225565699 is about 1070.1521602109.

The spelling of 1225565699 in words is "one billion, two hundred twenty-five million, five hundred sixty-five thousand, six hundred ninety-nine".