1981222 has 8 divisors (see below), whose sum is σ = 3074400. Its totient is φ = 956424.

The previous prime is 1981201. The next prime is 1981237. The reversal of 1981222 is 2221891.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-3 number, since 3×1981222³ = 23330319174995259144, which contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 17022 + ... + 17137.

It is an arithmetic number, because the mean of its divisors is an integer number (384300).

2^1981222 is an apocalyptic number.

1981222 is a deficient number, since it is larger than the sum of its proper divisors (1093178).

1981222 is a wasteful number, since it uses less digits than its factorization.

1981222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34190.

The product of its digits is 576, while the sum is 25.

The square root of 1981222 is about 1407.5588797631. The cubic root of 1981222 is about 125.5965511515.

The spelling of 1981222 in words is "one million, nine hundred eighty-one thousand, two hundred twenty-two".