1217213 has 2 divisors, whose sum is σ = 1217214. Its totient is φ = 1217212.

The previous prime is 1217207. The next prime is 1217219. The reversal of 1217213 is 3127121.

It is a balanced prime because it is at equal distance from previous prime (1217207) and next prime (1217219).

It can be written as a sum of positive squares in only one way, i.e., 1214404 + 2809 = 1102^2 + 53^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1217213 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1217191 and 1217200.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1217219) 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, 608606 + 608607.

It is an arithmetic number, because the mean of its divisors is an integer number (608607).

2^1217213 is an apocalyptic number.

It is an amenable number.

1217213 is a deficient number, since it is larger than the sum of its proper divisors (1).

1217213 is an equidigital number, since it uses as much as digits as its factorization.

1217213 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 84, while the sum is 17.

The square root of 1217213 is about 1103.2737647565. The cubic root of 1217213 is about 106.7715450666.

The spelling of 1217213 in words is "one million, two hundred seventeen thousand, two hundred thirteen".