248581 has 4 divisors (see below), whose sum is σ = 249664. Its totient is φ = 247500.

The previous prime is 248579. The next prime is 248587. The reversal of 248581 is 185842.

248581 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 185842 = 2 ⋅92921.

It is a cyclic number.

It is not a de Polignac number, because 248581 - 2¹ = 248579 is a prime.

It is a super-2 number, since 2×248581² = 123585027122, which contains 22 as substring.

It is a Duffinian number.

It is a nialpdrome in base 12.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (248587) 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, 45 + ... + 706.

It is an arithmetic number, because the mean of its divisors is an integer number (62416).

2²⁴⁸⁵⁸¹ is an apocalyptic number.

It is an amenable number.

248581 is a deficient number, since it is larger than the sum of its proper divisors (1083).

248581 is an equidigital number, since it uses as much as digits as its factorization.

248581 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1082.

The product of its digits is 2560, while the sum is 28.

The square root of 248581 is about 498.5789807042. The cubic root of 248581 is about 62.8766377449.

The spelling of 248581 in words is "two hundred forty-eight thousand, five hundred eighty-one".