391235 has 12 divisors (see below), whose sum is σ = 509472. Its totient is φ = 288288.

The previous prime is 391231. The next prime is 391247. The reversal of 391235 is 532193.

It is a happy number.

It is not a de Polignac number, because 391235 - 2² = 391231 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 391235.

It is not an unprimeable number, because it can be changed into a prime (391231) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 614 + ... + 1076.

It is an arithmetic number, because the mean of its divisors is an integer number (42456).

2³⁹¹²³⁵ is an apocalyptic number.

391235 is a deficient number, since it is larger than the sum of its proper divisors (118237).

391235 is a wasteful number, since it uses less digits than its factorization.

391235 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 494 (or 481 counting only the distinct ones).

The product of its digits is 810, while the sum is 23.

The square root of 391235 is about 625.4878096334. The cubic root of 391235 is about 73.1384748831.

It can be divided in two parts, 391 and 235, that added together give a palindrome (626).

The spelling of 391235 in words is "three hundred ninety-one thousand, two hundred thirty-five".