1222890 has 16 divisors (see below), whose sum is σ = 2935008. Its totient is φ = 326096.

The previous prime is 1222889. The next prime is 1222909. The reversal of 1222890 is 982221.

It is a self number, because there is not a number n which added to its sum of digits gives 1222890.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 20352 + ... + 20411.

It is an arithmetic number, because the mean of its divisors is an integer number (183438).

2^1222890 is an apocalyptic number.

1222890 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1222890 is an abundant number, since it is smaller than the sum of its proper divisors (1712118).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1222890 is a wasteful number, since it uses less digits than its factorization.

1222890 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40773.

The product of its (nonzero) digits is 576, while the sum is 24.

The square root of 1222890 is about 1105.8435694075. The cubic root of 1222890 is about 106.9372794560.

It can be divided in two parts, 1222 and 890, that added together give a palindrome (2112).

The spelling of 1222890 in words is "one million, two hundred twenty-two thousand, eight hundred ninety".