1641982 has 4 divisors (see below), whose sum is σ = 2462976. Its totient is φ = 820990.

The previous prime is 1641971. The next prime is 1642021. The reversal of 1641982 is 2891461.

It is a happy number.

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

It is a super-2 number, since 2×1641982² = 5392209776648, which contains 22 as substring.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 410494 + ... + 410497.

It is an arithmetic number, because the mean of its divisors is an integer number (615744).

2^1641982 is an apocalyptic number.

1641982 is a deficient number, since it is larger than the sum of its proper divisors (820994).

1641982 is an equidigital number, since it uses as much as digits as its factorization.

1641982 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 820993.

The product of its digits is 3456, while the sum is 31.

The square root of 1641982 is about 1281.3984548141. The cubic root of 1641982 is about 117.9748581885.

The spelling of 1641982 in words is "one million, six hundred forty-one thousand, nine hundred eighty-two".