1982215 has 4 divisors (see below), whose sum is σ = 2378664. Its totient is φ = 1585768.

The previous prime is 1982207. The next prime is 1982219. The reversal of 1982215 is 5122891.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1982215 - 2³ = 1982207 is a prime.

It is a Duffinian number.

It is a zygodrome in base 2.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1982219) 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 3 ways as a sum of consecutive naturals, for example, 198217 + ... + 198226.

It is an arithmetic number, because the mean of its divisors is an integer number (594666).

2^1982215 is an apocalyptic number.

1982215 is a deficient number, since it is larger than the sum of its proper divisors (396449).

1982215 is an equidigital number, since it uses as much as digits as its factorization.

1982215 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 396448.

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

The square root of 1982215 is about 1407.9115739279. The cubic root of 1982215 is about 125.6175308877.

It can be divided in two parts, 1982 and 215, that added together give a cube (2197 = 13³).

The spelling of 1982215 in words is "one million, nine hundred eighty-two thousand, two hundred fifteen".