1221167 has 2 divisors, whose sum is σ = 1221168. Its totient is φ = 1221166.

The previous prime is 1221163. The next prime is 1221193. The reversal of 1221167 is 7611221.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1221167 - 2² = 1221163 is a prime.

It is a Chen prime.

It is a plaindrome in base 13.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1221163) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 610583 + 610584.

It is an arithmetic number, because the mean of its divisors is an integer number (610584).

2^1221167 is an apocalyptic number.

1221167 is a deficient number, since it is larger than the sum of its proper divisors (1).

1221167 is an equidigital number, since it uses as much as digits as its factorization.

1221167 is an evil number, because the sum of its binary digits is even.

The product of its digits is 168, while the sum is 20.

The square root of 1221167 is about 1105.0642515257. The cubic root of 1221167 is about 106.8870324904.

Adding to 1221167 its reverse (7611221), we get a palindrome (8832388).

The spelling of 1221167 in words is "one million, two hundred twenty-one thousand, one hundred sixty-seven".