1881222 has 32 divisors (see below), whose sum is σ = 4396032. Its totient is φ = 525504.

The previous prime is 1881221. The next prime is 1881223. The reversal of 1881222 is 2221881.

It is an interprime number because it is at equal distance from previous prime (1881221) and next prime (1881223).

It is a junction number, because it is equal to n+sod(n) for n = 1881192 and 1881201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1881221) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1498 + ... + 2450.

It is an arithmetic number, because the mean of its divisors is an integer number (137376).

2^1881222 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1881222, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2198016).

1881222 is an abundant number, since it is smaller than the sum of its proper divisors (2514810).

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

1881222 is a wasteful number, since it uses less digits than its factorization.

1881222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1012.

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

The square root of 1881222 is about 1371.5764652399. The cubic root of 1881222 is about 123.4468510888.

The spelling of 1881222 in words is "one million, eight hundred eighty-one thousand, two hundred twenty-two".