391315 has 8 divisors (see below), whose sum is σ = 477648. Its totient is φ = 307680.

The previous prime is 391301. The next prime is 391331. The reversal of 391315 is 513193.

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

It is not a de Polignac number, because 391315 - 2⁵ = 391283 is a prime.

It is a Duffinian number.

It is an unprimeable 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 7 ways as a sum of consecutive naturals, for example, 337 + ... + 946.

It is an arithmetic number, because the mean of its divisors is an integer number (59706).

2³⁹¹³¹⁵ is an apocalyptic number.

391315 is a deficient number, since it is larger than the sum of its proper divisors (86333).

391315 is a wasteful number, since it uses less digits than its factorization.

391315 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1349.

The product of its digits is 405, while the sum is 22.

The square root of 391315 is about 625.5517564519. The cubic root of 391315 is about 73.1434596784.

The spelling of 391315 in words is "three hundred ninety-one thousand, three hundred fifteen".