1252212217 has 2 divisors, whose sum is σ = 1252212218. Its totient is φ = 1252212216.

The previous prime is 1252212167. The next prime is 1252212223. The reversal of 1252212217 is 7122122521.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1130573376 + 121638841 = 33624^2 + 11029^2 .

It is an emirp because it is prime and its reverse (7122122521) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1252212217 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1252212191 and 1252212200.

It is not a weakly prime, because it can be changed into another prime (1252212277) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 626106108 + 626106109.

It is an arithmetic number, because the mean of its divisors is an integer number (626106109).

Almost surely, 2^1252212217 is an apocalyptic number.

It is an amenable number.

1252212217 is a deficient number, since it is larger than the sum of its proper divisors (1).

1252212217 is an equidigital number, since it uses as much as digits as its factorization.

1252212217 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1120, while the sum is 25.

The square root of 1252212217 is about 35386.6107023546. The cubic root of 1252212217 is about 1077.8524474402.

Adding to 1252212217 its reverse (7122122521), we get a palindrome (8374334738).

The spelling of 1252212217 in words is "one billion, two hundred fifty-two million, two hundred twelve thousand, two hundred seventeen".