248491 has 4 divisors (see below), whose sum is σ = 249984. Its totient is φ = 247000.

The previous prime is 248483. The next prime is 248509. The reversal of 248491 is 194842.

248491 = 201² + 202² + ... + 206².

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 248491 - 2³ = 248483 is a prime.

It is a Duffinian number.

It is a nialpdrome in base 12.

It is not an unprimeable number, because it can be changed into a prime (248401) 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 3 ways as a sum of consecutive naturals, for example, 460 + ... + 841.

It is an arithmetic number, because the mean of its divisors is an integer number (62496).

2²⁴⁸⁴⁹¹ is an apocalyptic number.

248491 is a deficient number, since it is larger than the sum of its proper divisors (1493).

248491 is a wasteful number, since it uses less digits than its factorization.

248491 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1492.

The product of its digits is 2304, while the sum is 28.

The square root of 248491 is about 498.4887160207. The cubic root of 248491 is about 62.8690485614.

It can be divided in two parts, 24 and 8491, that added together give a triangular number (8515 = T₁₃₀).

The spelling of 248491 in words is "two hundred forty-eight thousand, four hundred ninety-one".