391269 has 4 divisors (see below), whose sum is σ = 521696. Its totient is φ = 260844.

The previous prime is 391249. The next prime is 391273. The reversal of 391269 is 962193.

391269 is digitally balanced in base 7, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 391269 - 2¹² = 387173 is a prime.

It is a super-2 number, since 2×391269² = 306182860722, which contains 22 as substring.

It is a D-number.

It is a Duffinian number.

391269 is strictly pandigital in base 7.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (391219) 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 3 ways as a sum of consecutive naturals, for example, 65209 + ... + 65214.

It is an arithmetic number, because the mean of its divisors is an integer number (130424).

2³⁹¹²⁶⁹ is an apocalyptic number.

It is an amenable number.

391269 is a deficient number, since it is larger than the sum of its proper divisors (130427).

391269 is a wasteful number, since it uses less digits than its factorization.

391269 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 130426.

The product of its digits is 2916, while the sum is 30.

The square root of 391269 is about 625.5149878300. The cubic root of 391269 is about 73.1405935041.

The spelling of 391269 in words is "three hundred ninety-one thousand, two hundred sixty-nine".