248391 has 24 divisors (see below), whose sum is σ = 423696. Its totient is φ = 138240.

The previous prime is 248389. The next prime is 248401. The reversal of 248391 is 193842.

It is not a de Polignac number, because 248391 - 2¹ = 248389 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (248351) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1191 + ... + 1383.

It is an arithmetic number, because the mean of its divisors is an integer number (17654).

2²⁴⁸³⁹¹ is an apocalyptic number.

248391 is a deficient number, since it is larger than the sum of its proper divisors (175305).

248391 is a wasteful number, since it uses less digits than its factorization.

248391 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 223 (or 220 counting only the distinct ones).

The product of its digits is 1728, while the sum is 27.

The square root of 248391 is about 498.3884027543. The cubic root of 248391 is about 62.8606139858.

The spelling of 248391 in words is "two hundred forty-eight thousand, three hundred ninety-one".