1222867 has 4 divisors (see below), whose sum is σ = 1242976. Its totient is φ = 1202760.

The previous prime is 1222853. The next prime is 1222889. The reversal of 1222867 is 7682221.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1222867 - 2¹¹ = 1220819 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1222847) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9963 + ... + 10084.

It is an arithmetic number, because the mean of its divisors is an integer number (310744).

2^1222867 is an apocalyptic number.

1222867 is a deficient number, since it is larger than the sum of its proper divisors (20109).

1222867 is an equidigital number, since it uses as much as digits as its factorization.

1222867 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20108.

The product of its digits is 2688, while the sum is 28.

The square root of 1222867 is about 1105.8331700578. The cubic root of 1222867 is about 106.9366090297.

The spelling of 1222867 in words is "one million, two hundred twenty-two thousand, eight hundred sixty-seven".