1216417 has 2 divisors, whose sum is σ = 1216418. Its totient is φ = 1216416.

The previous prime is 1216393. The next prime is 1216421. The reversal of 1216417 is 7146121.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 720801 + 495616 = 849^2 + 704^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1216417 is a prime.

It is a Chen prime.

1216417 is a lucky number.

It is not a weakly prime, because it can be changed into another prime (1216717) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 608208 + 608209.

It is an arithmetic number, because the mean of its divisors is an integer number (608209).

2^1216417 is an apocalyptic number.

It is an amenable number.

1216417 is a deficient number, since it is larger than the sum of its proper divisors (1).

1216417 is an equidigital number, since it uses as much as digits as its factorization.

1216417 is an evil number, because the sum of its binary digits is even.

The product of its digits is 336, while the sum is 22.

The square root of 1216417 is about 1102.9129612077. The cubic root of 1216417 is about 106.7482654699.

The spelling of 1216417 in words is "one million, two hundred sixteen thousand, four hundred seventeen".