1982491 has 6 divisors (see below), whose sum is σ = 2306220. Its totient is φ = 1699236.

The previous prime is 1982471. The next prime is 1982501. The reversal of 1982491 is 1942891.

It is not a de Polignac number, because 1982491 - 2¹¹ = 1980443 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1982401) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 20181 + ... + 20278.

It is an arithmetic number, because the mean of its divisors is an integer number (384370).

2^1982491 is an apocalyptic number.

1982491 is a deficient number, since it is larger than the sum of its proper divisors (323729).

1982491 is an equidigital number, since it uses as much as digits as its factorization.

1982491 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40473 (or 40466 counting only the distinct ones).

The product of its digits is 5184, while the sum is 34.

The square root of 1982491 is about 1408.0095880355. The cubic root of 1982491 is about 125.6233608690.

The spelling of 1982491 in words is "one million, nine hundred eighty-two thousand, four hundred ninety-one".