3956239 has 4 divisors (see below), whose sum is σ = 4521424. Its totient is φ = 3391056.

The previous prime is 3956233. The next prime is 3956261. The reversal of 3956239 is 9326593.

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

It is a cyclic number.

It is not a de Polignac number, because 3956239 - 2⁹ = 3955727 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 3956198 and 3956207.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3956233) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 282582 + ... + 282595.

It is an arithmetic number, because the mean of its divisors is an integer number (1130356).

Almost surely, 2^3956239 is an apocalyptic number.

3956239 is a deficient number, since it is larger than the sum of its proper divisors (565185).

3956239 is an equidigital number, since it uses as much as digits as its factorization.

3956239 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 565184.

The product of its digits is 43740, while the sum is 37.

The square root of 3956239 is about 1989.0296629261. The cubic root of 3956239 is about 158.1590957424.

It can be divided in two parts, 39562 and 39, that added together give a square (39601 = 199²).

The spelling of 3956239 in words is "three million, nine hundred fifty-six thousand, two hundred thirty-nine".