1981962 has 48 divisors (see below), whose sum is σ = 4715520. Its totient is φ = 616896.

The previous prime is 1981949. The next prime is 1981963. The reversal of 1981962 is 2691891.

It is not an unprimeable number, because it can be changed into a prime (1981963) 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 23 ways as a sum of consecutive naturals, for example, 15543 + ... + 15669.

It is an arithmetic number, because the mean of its divisors is an integer number (98240).

2^1981962 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1981962, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2357760).

1981962 is an abundant number, since it is smaller than the sum of its proper divisors (2733558).

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

1981962 is a wasteful number, since it uses less digits than its factorization.

1981962 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 172 (or 149 counting only the distinct ones).

The product of its digits is 7776, while the sum is 36.

The square root of 1981962 is about 1407.8217216679. The cubic root of 1981962 is about 125.6121862627.

It can be divided in two parts, 19819 and 62, that added together give a square (19881 = 141²).

The spelling of 1981962 in words is "one million, nine hundred eighty-one thousand, nine hundred sixty-two".