1982121 has 8 divisors (see below), whose sum is σ = 2734080. Its totient is φ = 1275792.

The previous prime is 1982111. The next prime is 1982129. The reversal of 1982121 is 1212891.

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

It is not a de Polignac number, because 1982121 - 2¹¹ = 1980073 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1982091 and 1982100.

It is not an unprimeable number, because it can be changed into a prime (1982129) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11305 + ... + 11478.

It is an arithmetic number, because the mean of its divisors is an integer number (341760).

2^1982121 is an apocalyptic number.

It is an amenable number.

1982121 is a deficient number, since it is larger than the sum of its proper divisors (751959).

1982121 is a wasteful number, since it uses less digits than its factorization.

1982121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22815.

The product of its digits is 288, while the sum is 24.

The square root of 1982121 is about 1407.8781907537. The cubic root of 1982121 is about 125.6155451908.

The spelling of 1982121 in words is "one million, nine hundred eighty-two thousand, one hundred twenty-one".