1985221 has 8 divisors (see below), whose sum is σ = 2312064. Its totient is φ = 1669200.

The previous prime is 1985219. The next prime is 1985227. The reversal of 1985221 is 1225891.

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

It is a cyclic number.

It is not a de Polignac number, because 1985221 - 2¹ = 1985219 is a prime.

It is a super-2 number, since 2×1985221² = 7882204837682, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1985221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1985227) by changing a digit.

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, 2305 + ... + 3046.

It is an arithmetic number, because the mean of its divisors is an integer number (289008).

2^1985221 is an apocalyptic number.

It is an amenable number.

1985221 is a deficient number, since it is larger than the sum of its proper divisors (326843).

1985221 is an equidigital number, since it uses as much as digits as its factorization.

1985221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5411.

The product of its digits is 1440, while the sum is 28.

The square root of 1985221 is about 1408.9787081429. The cubic root of 1985221 is about 125.6809978645.

The spelling of 1985221 in words is "one million, nine hundred eighty-five thousand, two hundred twenty-one".