1983742 has 4 divisors (see below), whose sum is σ = 2975616. Its totient is φ = 991870.

The previous prime is 1983731. The next prime is 1983743. The reversal of 1983742 is 2473891.

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

It is a junction number, because it is equal to n+sod(n) for n = 1983698 and 1983707.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1983743) by changing a digit.

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, 495934 + ... + 495937.

It is an arithmetic number, because the mean of its divisors is an integer number (743904).

2^1983742 is an apocalyptic number.

1983742 is a deficient number, since it is larger than the sum of its proper divisors (991874).

1983742 is an equidigital number, since it uses as much as digits as its factorization.

1983742 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 991873.

The product of its digits is 12096, while the sum is 34.

The square root of 1983742 is about 1408.4537621094. The cubic root of 1983742 is about 125.6497791108.

The spelling of 1983742 in words is "one million, nine hundred eighty-three thousand, seven hundred forty-two".