1243214417 has 2 divisors, whose sum is σ = 1243214418. Its totient is φ = 1243214416.

The previous prime is 1243214381. The next prime is 1243214443. The reversal of 1243214417 is 7144123421.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1016079376 + 227135041 = 31876^2 + 15071^2 .

It is an emirp because it is prime and its reverse (7144123421) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1243214417 - 2¹⁰ = 1243213393 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1243214417.

It is not a weakly prime, because it can be changed into another prime (1243244417) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 621607208 + 621607209.

It is an arithmetic number, because the mean of its divisors is an integer number (621607209).

Almost surely, 2^1243214417 is an apocalyptic number.

It is an amenable number.

1243214417 is a deficient number, since it is larger than the sum of its proper divisors (1).

1243214417 is an equidigital number, since it uses as much as digits as its factorization.

1243214417 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5376, while the sum is 29.

The square root of 1243214417 is about 35259.2458370851. The cubic root of 1243214417 is about 1075.2645945407.

Adding to 1243214417 its reverse (7144123421), we get a palindrome (8387337838).

The spelling of 1243214417 in words is "one billion, two hundred forty-three million, two hundred fourteen thousand, four hundred seventeen".