391601 has 8 divisors (see below), whose sum is σ = 458304. Its totient is φ = 327600.

The previous prime is 391579. The next prime is 391613. The reversal of 391601 is 106193.

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

It is not a de Polignac number, because 391601 - 2⁶ = 391537 is a prime.

It is not an unprimeable number, because it can be changed into a prime (391631) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 350 + ... + 951.

It is an arithmetic number, because the mean of its divisors is an integer number (57288).

2³⁹¹⁶⁰¹ is an apocalyptic number.

It is an amenable number.

391601 is a deficient number, since it is larger than the sum of its proper divisors (66703).

391601 is a wasteful number, since it uses less digits than its factorization.

391601 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1351.

The product of its (nonzero) digits is 162, while the sum is 20.

The square root of 391601 is about 625.7803128894. The cubic root of 391601 is about 73.1612747679.

Adding to 391601 its reverse (106193), we get a palindrome (497794).

The spelling of 391601 in words is "three hundred ninety-one thousand, six hundred one".