1216867 has 2 divisors, whose sum is σ = 1216868. Its totient is φ = 1216866.

The previous prime is 1216849. The next prime is 1216871. The reversal of 1216867 is 7686121.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1216867 - 2¹¹ = 1214819 is a prime.

It is not a weakly prime, because it can be changed into another prime (1216807) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 608433 + 608434.

It is an arithmetic number, because the mean of its divisors is an integer number (608434).

2^1216867 is an apocalyptic number.

1216867 is a deficient number, since it is larger than the sum of its proper divisors (1).

1216867 is an equidigital number, since it uses as much as digits as its factorization.

1216867 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4032, while the sum is 31.

The square root of 1216867 is about 1103.1169475627. The cubic root of 1216867 is about 106.7614272933.

The spelling of 1216867 in words is "one million, two hundred sixteen thousand, eight hundred sixty-seven".