391122 has 16 divisors (see below), whose sum is σ = 869280. Its totient is φ = 130356.

The previous prime is 391117. The next prime is 391133. The reversal of 391122 is 221193.

It is a happy number.

391122 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a nude number because it is divisible by every one of its digits.

It is a junction number, because it is equal to n+sod(n) for n = 391095 and 391104.

It is an unprimeable number.

391122 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

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 7 ways as a sum of consecutive naturals, for example, 3568 + ... + 3675.

It is an arithmetic number, because the mean of its divisors is an integer number (54330).

2³⁹¹¹²² is an apocalyptic number.

391122 is an abundant number, since it is smaller than the sum of its proper divisors (478158).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

391122 is a wasteful number, since it uses less digits than its factorization.

391122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7254 (or 7248 counting only the distinct ones).

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

The square root of 391122 is about 625.3974736118. The cubic root of 391122 is about 73.1314327017.

It can be divided in two parts, 3 and 91122, that added together give a cube (91125 = 45³).

The spelling of 391122 in words is "three hundred ninety-one thousand, one hundred twenty-two".