4086391 has 8 divisors (see below), whose sum is σ = 4227120. Its totient is φ = 3947328.

The previous prime is 4086377. The next prime is 4086403. The reversal of 4086391 is 1936804.

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 4086391 - 2¹⁷ = 3955319 is a prime.

It is an Ulam number.

It is a Duffinian number.

4086391 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4086091) 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, 6315 + ... + 6931.

It is an arithmetic number, because the mean of its divisors is an integer number (528390).

Almost surely, 2^4086391 is an apocalyptic number.

4086391 is a deficient number, since it is larger than the sum of its proper divisors (140729).

4086391 is a wasteful number, since it uses less digits than its factorization.

4086391 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 833.

The product of its (nonzero) digits is 5184, while the sum is 31.

The square root of 4086391 is about 2021.4823768710. The cubic root of 4086391 is about 159.8747848453.

The spelling of 4086391 in words is "four million, eighty-six thousand, three hundred ninety-one".