1222667 has 2 divisors, whose sum is σ = 1222668. Its totient is φ = 1222666.

The previous prime is 1222651. The next prime is 1222679. The reversal of 1222667 is 7662221.

1222667 is an esthetic number in base 11, because in such base its adjacent digits differ by 1.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1222667 - 2⁴ = 1222651 is a prime.

It is a plaindrome in base 10.

It is not a weakly prime, because it can be changed into another prime (1222267) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 611333 + 611334.

It is an arithmetic number, because the mean of its divisors is an integer number (611334).

2^1222667 is an apocalyptic number.

1222667 is a deficient number, since it is larger than the sum of its proper divisors (1).

1222667 is an equidigital number, since it uses as much as digits as its factorization.

1222667 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2016, while the sum is 26.

The square root of 1222667 is about 1105.7427368064. The cubic root of 1222667 is about 106.9307788814.

Adding to 1222667 its reverse (7662221), we get a palindrome (8884888).

The spelling of 1222667 in words is "one million, two hundred twenty-two thousand, six hundred sixty-seven".