1222858 has 16 divisors (see below), whose sum is σ = 2257920. Its totient is φ = 483696.

The previous prime is 1222853. The next prime is 1222889. The reversal of 1222858 is 8582221.

It is not an unprimeable number, because it can be changed into a prime (1222853) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3178 + ... + 3541.

It is an arithmetic number, because the mean of its divisors is an integer number (141120).

2^1222858 is an apocalyptic number.

1222858 is a deficient number, since it is larger than the sum of its proper divisors (1035062).

1222858 is a wasteful number, since it uses less digits than its factorization.

1222858 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6741.

The product of its digits is 2560, while the sum is 28.

The square root of 1222858 is about 1105.8291007204. The cubic root of 1222858 is about 106.9363466867.

It can be divided in two parts, 1222 and 858, that added together give a triangular number (2080 = T₆₄).

The spelling of 1222858 in words is "one million, two hundred twenty-two thousand, eight hundred fifty-eight".