1222999 has 8 divisors (see below), whose sum is σ = 1258560. Its totient is φ = 1188096.

The previous prime is 1222993. The next prime is 1223003. The reversal of 1222999 is 9992221.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1222999 - 2⁵ = 1222967 is a prime.

It is a Duffinian number.

1222999 is a lucky number.

It is a plaindrome in base 10.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1222993) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8859 + ... + 8995.

It is an arithmetic number, because the mean of its divisors is an integer number (157320).

2^1222999 is an apocalyptic number.

1222999 is a deficient number, since it is larger than the sum of its proper divisors (35561).

1222999 is a wasteful number, since it uses less digits than its factorization.

1222999 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 329.

The product of its digits is 5832, while the sum is 34.

The square root of 1222999 is about 1105.8928519527. The cubic root of 1222999 is about 106.9404565794.

The spelling of 1222999 in words is "one million, two hundred twenty-two thousand, nine hundred ninety-nine".