391941 has 24 divisors (see below), whose sum is σ = 640224. Its totient is φ = 228960.

The previous prime is 391939. The next prime is 391961. The reversal of 391941 is 149193.

It is not a de Polignac number, because 391941 - 2¹ = 391939 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (391921) by changing a digit.

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 23 ways as a sum of consecutive naturals, for example, 3610 + ... + 3716.

It is an arithmetic number, because the mean of its divisors is an integer number (26676).

2³⁹¹⁹⁴¹ is an apocalyptic number.

It is an amenable number.

391941 is a deficient number, since it is larger than the sum of its proper divisors (248283).

391941 is a wasteful number, since it uses less digits than its factorization.

391941 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 161 (or 158 counting only the distinct ones).

The product of its digits is 972, while the sum is 27.

The square root of 391941 is about 626.0519147802. The cubic root of 391941 is about 73.1824422639.

The spelling of 391941 in words is "three hundred ninety-one thousand, nine hundred forty-one".