1986742 has 8 divisors (see below), whose sum is σ = 2996136. Its totient is φ = 988032.

The previous prime is 1986713. The next prime is 1986749. The reversal of 1986742 is 2476891.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1986749) 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 3 ways as a sum of consecutive naturals, for example, 2188 + ... + 2959.

It is an arithmetic number, because the mean of its divisors is an integer number (374517).

2^1986742 is an apocalyptic number.

1986742 is a deficient number, since it is larger than the sum of its proper divisors (1009394).

1986742 is a wasteful number, since it uses less digits than its factorization.

1986742 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5342.

The product of its digits is 24192, while the sum is 37.

The square root of 1986742 is about 1409.5183574541. The cubic root of 1986742 is about 125.7130869868.

The spelling of 1986742 in words is "one million, nine hundred eighty-six thousand, seven hundred forty-two".