391246 has 8 divisors (see below), whose sum is σ = 598104. Its totient is φ = 191880.

The previous prime is 391231. The next prime is 391247. The reversal of 391246 is 642193.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a self number, because there is not a number n which added to its sum of digits gives 391246.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (391247) by changing a digit.

391246 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 (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1740 + ... + 1951.

It is an arithmetic number, because the mean of its divisors is an integer number (74763).

2³⁹¹²⁴⁶ is an apocalyptic number.

391246 is a deficient number, since it is larger than the sum of its proper divisors (206858).

391246 is a wasteful number, since it uses less digits than its factorization.

391246 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3746.

The product of its digits is 1296, while the sum is 25.

The square root of 391246 is about 625.4966027086. The cubic root of 391246 is about 73.1391603327.

The spelling of 391246 in words is "three hundred ninety-one thousand, two hundred forty-six".