391065 has 24 divisors (see below), whose sum is σ = 668928. Its totient is φ = 194880.

The previous prime is 391063. The next prime is 391067. The reversal of 391065 is 560193.

It is an interprime number because it is at equal distance from previous prime (391063) and next prime (391067).

It is not a de Polignac number, because 391065 - 2¹ = 391063 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (391063) 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 23 ways as a sum of consecutive naturals, for example, 12600 + ... + 12630.

It is an arithmetic number, because the mean of its divisors is an integer number (27872).

2³⁹¹⁰⁶⁵ is an apocalyptic number.

It is an amenable number.

391065 is a deficient number, since it is larger than the sum of its proper divisors (277863).

391065 is a wasteful number, since it uses less digits than its factorization.

391065 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 97 (or 68 counting only the distinct ones).

The product of its (nonzero) digits is 810, while the sum is 24.

The square root of 391065 is about 625.3519009326. The cubic root of 391065 is about 73.1278799363.

The spelling of 391065 in words is "three hundred ninety-one thousand, sixty-five".