3942743 has 4 divisors (see below), whose sum is σ = 4506000. Its totient is φ = 3379488.

The previous prime is 3942739. The next prime is 3942751. The reversal of 3942743 is 3472493.

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

It is not a de Polignac number, because 3942743 - 2² = 3942739 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3942773) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 281618 + ... + 281631.

It is an arithmetic number, because the mean of its divisors is an integer number (1126500).

Almost surely, 2^3942743 is an apocalyptic number.

3942743 is a deficient number, since it is larger than the sum of its proper divisors (563257).

3942743 is an equidigital number, since it uses as much as digits as its factorization.

3942743 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 563256.

The product of its digits is 18144, while the sum is 32.

The square root of 3942743 is about 1985.6341556289. The cubic root of 3942743 is about 157.9790470532.

The spelling of 3942743 in words is "three million, nine hundred forty-two thousand, seven hundred forty-three".