3981742 has 4 divisors (see below), whose sum is σ = 5972616. Its totient is φ = 1990870.

The previous prime is 3981739. The next prime is 3981749. The reversal of 3981742 is 2471893.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 2471893 = 547 ⋅4519.

It is a junction number, because it is equal to n+sod(n) for n = 3981698 and 3981707.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3981749) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 995434 + ... + 995437.

It is an arithmetic number, because the mean of its divisors is an integer number (1493154).

Almost surely, 2^3981742 is an apocalyptic number.

3981742 is a deficient number, since it is larger than the sum of its proper divisors (1990874).

3981742 is a wasteful number, since it uses less digits than its factorization.

3981742 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1990873.

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

The square root of 3981742 is about 1995.4302794134. The cubic root of 3981742 is about 158.4982137147.

The spelling of 3981742 in words is "three million, nine hundred eighty-one thousand, seven hundred forty-two".