391124 has 12 divisors (see below), whose sum is σ = 688884. Its totient is φ = 194304.

The previous prime is 391117. The next prime is 391133. The reversal of 391124 is 421193.

It can be written as a sum of positive squares in 2 ways, for example, as 110224 + 280900 = 332^2 + 530^2 .

It is a junction number, because it is equal to n+sod(n) for n = 391096 and 391105.

It is a congruent number.

It is an unprimeable 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 3 ways as a sum of consecutive naturals, for example, 932 + ... + 1284.

It is an arithmetic number, because the mean of its divisors is an integer number (57407).

2³⁹¹¹²⁴ is an apocalyptic number.

It is an amenable number.

391124 is a deficient number, since it is larger than the sum of its proper divisors (297760).

391124 is a wasteful number, since it uses less digits than its factorization.

391124 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 634 (or 632 counting only the distinct ones).

The product of its digits is 216, while the sum is 20.

The square root of 391124 is about 625.3990725929. The cubic root of 391124 is about 73.1315573539.

It can be divided in two parts, 391 and 124, that multiplied together give a palindrome (48484).

The spelling of 391124 in words is "three hundred ninety-one thousand, one hundred twenty-four".