1225042417 has 2 divisors, whose sum is σ = 1225042418. Its totient is φ = 1225042416.

The previous prime is 1225042393. The next prime is 1225042421. The reversal of 1225042417 is 7142405221.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 986525281 + 238517136 = 31409^2 + 15444^2 .

It is a cyclic number.

It is not a de Polignac number, because 1225042417 - 2¹⁹ = 1224518129 is a prime.

It is not a weakly prime, because it can be changed into another prime (1225045417) 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, 612521208 + 612521209.

It is an arithmetic number, because the mean of its divisors is an integer number (612521209).

Almost surely, 2^1225042417 is an apocalyptic number.

It is an amenable number.

1225042417 is a deficient number, since it is larger than the sum of its proper divisors (1).

1225042417 is an equidigital number, since it uses as much as digits as its factorization.

1225042417 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4480, while the sum is 28.

The square root of 1225042417 is about 35000.6059518975. The cubic root of 1225042417 is about 1069.9998302617. Note that the first 3 decimals are identical.

Adding to 1225042417 its reverse (7142405221), we get a palindrome (8367447638).

The spelling of 1225042417 in words is "one billion, two hundred twenty-five million, forty-two thousand, four hundred seventeen".