3921239 has 8 divisors (see below), whose sum is σ = 4717440. Its totient is φ = 3184056.

The previous prime is 3921227. The next prime is 3921287. The reversal of 3921239 is 9321293.

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

It is a cyclic number.

It is not a de Polignac number, because 3921239 - 2¹⁶ = 3855703 is a prime.

It is a super-2 number, since 2×3921239² = 30752230590242, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3921209) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14609 + ... + 14874.

It is an arithmetic number, because the mean of its divisors is an integer number (589680).

Almost surely, 2^3921239 is an apocalyptic number.

3921239 is a deficient number, since it is larger than the sum of its proper divisors (796201).

3921239 is a wasteful number, since it uses less digits than its factorization.

3921239 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29509.

The product of its digits is 2916, while the sum is 29.

The square root of 3921239 is about 1980.2118573526. The cubic root of 3921239 is about 157.6913136684.

The spelling of 3921239 in words is "three million, nine hundred twenty-one thousand, two hundred thirty-nine".