248681 has 4 divisors (see below), whose sum is σ = 250500. Its totient is φ = 246864.

The previous prime is 248657. The next prime is 248683. The reversal of 248681 is 186842.

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

It can be written as a sum of positive squares in 2 ways, for example, as 75625 + 173056 = 275^2 + 416^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-248681 is a prime.

It is a super-2 number, since 2×248681² = 123684479522, which contains 22 as substring.

It is a Duffinian number.

It is a plaindrome in base 14.

It is not an unprimeable number, because it can be changed into a prime (248683) 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, 686 + ... + 983.

It is an arithmetic number, because the mean of its divisors is an integer number (62625).

2²⁴⁸⁶⁸¹ is an apocalyptic number.

It is an amenable number.

248681 is a deficient number, since it is larger than the sum of its proper divisors (1819).

248681 is a wasteful number, since it uses less digits than its factorization.

248681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1818.

The product of its digits is 3072, while the sum is 29.

The square root of 248681 is about 498.6792556343. The cubic root of 248681 is about 62.8850680229.

It can be divided in two parts, 248 and 681, that added together give a palindrome (929).

The spelling of 248681 in words is "two hundred forty-eight thousand, six hundred eighty-one".