391241 has 4 divisors (see below), whose sum is σ = 393984. Its totient is φ = 388500.

The previous prime is 391231. The next prime is 391247. The reversal of 391241 is 142193.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 391241 - 2⁶ = 391177 is a prime.

It is a Duffinian number.

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

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1145 + ... + 1446.

It is an arithmetic number, because the mean of its divisors is an integer number (98496).

2³⁹¹²⁴¹ is an apocalyptic number.

It is an amenable number.

391241 is a deficient number, since it is larger than the sum of its proper divisors (2743).

391241 is a wasteful number, since it uses less digits than its factorization.

391241 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2742.

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

The square root of 391241 is about 625.4926058716. The cubic root of 391241 is about 73.1388487663.

The spelling of 391241 in words is "three hundred ninety-one thousand, two hundred forty-one".