1222513 has 2 divisors, whose sum is σ = 1222514.
Its totient is φ = 1222512.
The previous prime is 1222499. The next prime is 1222523. The reversal of 1222513 is 3152221.
Adding to 1222513 its reverse (3152221), we get a palindrome (4374734).
It is a strong prime.
It can be written as a sum of positive squares in only one way, i.e., 944784 + 277729 = 972^2 + 527^2
It is an emirp because it is prime and its reverse (3152221) is a distict prime.
It is a cyclic number.
It is a de Polignac number, because none of the positive numbers 2k-1222513 is a prime.
It is not a weakly prime, because it can be changed into another prime (1222523) 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, 611256 + 611257.
It is an arithmetic number, because the mean of its divisors is an integer number (611257).
21222513 is an apocalyptic number.
It is an amenable number.
1222513 is a deficient number, since it is larger than the sum of its proper divisors (1).
1222513 is an equidigital number, since it uses as much as digits as its factorization.
1222513 is an odious number, because the sum of its binary digits is odd.
The product of its digits is 120, while the sum is 16.
The square root of 1222513 is about 1105.6730981624.
The cubic root of 1222513 is about 106.9262892340.
The spelling of 1222513 in words is "one million, two hundred twenty-two thousand, five hundred thirteen".