391041 has 16 divisors (see below), whose sum is σ = 662400. Its totient is φ = 223344.

The previous prime is 391031. The next prime is 391049. The reversal of 391041 is 140193.

It is not a de Polignac number, because 391041 - 2⁵ = 391009 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (391049) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 846 + ... + 1223.

It is an arithmetic number, because the mean of its divisors is an integer number (41400).

2³⁹¹⁰⁴¹ is an apocalyptic number.

It is an amenable number.

391041 is a deficient number, since it is larger than the sum of its proper divisors (271359).

391041 is a wasteful number, since it uses less digits than its factorization.

391041 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2085 (or 2079 counting only the distinct ones).

The product of its (nonzero) digits is 108, while the sum is 18.

The square root of 391041 is about 625.3327114425. The cubic root of 391041 is about 73.1263839317.

The spelling of 391041 in words is "three hundred ninety-one thousand, forty-one".