1221882 has 16 divisors (see below), whose sum is σ = 2503872. Its totient is φ = 397280.

The previous prime is 1221863. The next prime is 1221907. The reversal of 1221882 is 2881221.

It is an unprimeable number.

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, 2238 + ... + 2729.

It is an arithmetic number, because the mean of its divisors is an integer number (156492).

2^1221882 is an apocalyptic number.

1221882 is an abundant number, since it is smaller than the sum of its proper divisors (1281990).

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

1221882 is a wasteful number, since it uses less digits than its factorization.

1221882 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5013.

The product of its digits is 512, while the sum is 24.

The square root of 1221882 is about 1105.3877147861. The cubic root of 1221882 is about 106.9078894023.

The spelling of 1221882 in words is "one million, two hundred twenty-one thousand, eight hundred eighty-two".