4091039 has 4 divisors (see below), whose sum is σ = 4223040. Its totient is φ = 3959040.

The previous prime is 4091011. The next prime is 4091047. The reversal of 4091039 is 9301904.

It is a happy number.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-4091039 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 4090999 and 4091017.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4091069) 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, 65954 + ... + 66015.

It is an arithmetic number, because the mean of its divisors is an integer number (1055760).

Almost surely, 2^4091039 is an apocalyptic number.

4091039 is a deficient number, since it is larger than the sum of its proper divisors (132001).

4091039 is a wasteful number, since it uses less digits than its factorization.

4091039 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 132000.

The product of its (nonzero) digits is 972, while the sum is 26.

The square root of 4091039 is about 2022.6317015216. The cubic root of 4091039 is about 159.9353775490.

The spelling of 4091039 in words is "four million, ninety-one thousand, thirty-nine".