1980841 has 4 divisors (see below), whose sum is σ = 1984852. Its totient is φ = 1976832.

The previous prime is 1980821. The next prime is 1980859. The reversal of 1980841 is 1480891.

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

It can be written as a sum of positive squares in 2 ways, for example, as 1490841 + 490000 = 1221^2 + 700^2 .

It is a cyclic number.

It is not a de Polignac number, because 1980841 - 2⁵ = 1980809 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1980821) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1140 + ... + 2293.

It is an arithmetic number, because the mean of its divisors is an integer number (496213).

2^1980841 is an apocalyptic number.

It is an amenable number.

1980841 is a deficient number, since it is larger than the sum of its proper divisors (4011).

1980841 is an equidigital number, since it uses as much as digits as its factorization.

1980841 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4010.

The product of its (nonzero) digits is 2304, while the sum is 31.

The square root of 1980841 is about 1407.4235325587. The cubic root of 1980841 is about 125.5884996638.

The spelling of 1980841 in words is "one million, nine hundred eighty thousand, eight hundred forty-one".