3942239 has 16 divisors (see below), whose sum is σ = 4786176. Its totient is φ = 3175200.

The previous prime is 3942227. The next prime is 3942241. The reversal of 3942239 is 9322493.

It is a de Polignac number, because none of the positive numbers 2^k-3942239 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3942209) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7784 + ... + 8274.

It is an arithmetic number, because the mean of its divisors is an integer number (299136).

Almost surely, 2^3942239 is an apocalyptic number.

3942239 is a deficient number, since it is larger than the sum of its proper divisors (843937).

3942239 is a wasteful number, since it uses less digits than its factorization.

3942239 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 566.

The product of its digits is 11664, while the sum is 32.

The square root of 3942239 is about 1985.5072399767. The cubic root of 3942239 is about 157.9723152904.

The spelling of 3942239 in words is "three million, nine hundred forty-two thousand, two hundred thirty-nine".