1221834 has 16 divisors (see below), whose sum is σ = 2522880. Its totient is φ = 394080.

The previous prime is 1221823. The next prime is 1221853. The reversal of 1221834 is 4381221.

It is a self number, because there is not a number n which added to its sum of digits gives 1221834.

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, 3099 + ... + 3470.

It is an arithmetic number, because the mean of its divisors is an integer number (157680).

2^1221834 is an apocalyptic number.

1221834 is an abundant number, since it is smaller than the sum of its proper divisors (1301046).

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

1221834 is a wasteful number, since it uses less digits than its factorization.

1221834 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6605.

The product of its digits is 384, while the sum is 21.

The square root of 1221834 is about 1105.3660027339. The cubic root of 1221834 is about 106.9064894728.

The spelling of 1221834 in words is "one million, two hundred twenty-one thousand, eight hundred thirty-four".