1980942 has 16 divisors (see below), whose sum is σ = 4195152. Its totient is φ = 621440.

The previous prime is 1980941. The next prime is 1980947. The reversal of 1980942 is 2490891.

It is a plaindrome in base 11.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1980941) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9609 + ... + 9812.

It is an arithmetic number, because the mean of its divisors is an integer number (262197).

2^1980942 is an apocalyptic number.

1980942 is an abundant number, since it is smaller than the sum of its proper divisors (2214210).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1980942 is a wasteful number, since it uses less digits than its factorization.

1980942 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19443.

The product of its (nonzero) digits is 5184, while the sum is 33.

The square root of 1980942 is about 1407.4594132692. The cubic root of 1980942 is about 125.5906341482.

The spelling of 1980942 in words is "one million, nine hundred eighty thousand, nine hundred forty-two".