1984742 has 4 divisors (see below), whose sum is σ = 2977116. Its totient is φ = 992370.

The previous prime is 1984729. The next prime is 1984747. The reversal of 1984742 is 2474891.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 2474891 = 313 ⋅7907.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1984747) 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 as a sum of consecutive naturals, namely, 496184 + ... + 496187.

It is an arithmetic number, because the mean of its divisors is an integer number (744279).

2^1984742 is an apocalyptic number.

1984742 is a deficient number, since it is larger than the sum of its proper divisors (992374).

1984742 is an equidigital number, since it uses as much as digits as its factorization.

1984742 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 992373.

The product of its digits is 16128, while the sum is 35.

The square root of 1984742 is about 1408.8087166113. The cubic root of 1984742 is about 125.6708888236.

The spelling of 1984742 in words is "one million, nine hundred eighty-four thousand, seven hundred forty-two".