248781 has 8 divisors (see below), whose sum is σ = 357280. Its totient is φ = 153072.

The previous prime is 248779. The next prime is 248783. The reversal of 248781 is 187842.

It is an interprime number because it is at equal distance from previous prime (248779) and next prime (248783).

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 248781 - 2¹ = 248779 is a prime.

It is a super-2 number, since 2×248781² = 123783971922, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (248783) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3151 + ... + 3228.

It is an arithmetic number, because the mean of its divisors is an integer number (44660).

2²⁴⁸⁷⁸¹ is an apocalyptic number.

It is an amenable number.

248781 is a deficient number, since it is larger than the sum of its proper divisors (108499).

248781 is a wasteful number, since it uses less digits than its factorization.

248781 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6395.

The product of its digits is 3584, while the sum is 30.

The square root of 248781 is about 498.7795104051. The cubic root of 248781 is about 62.8934960413.

The spelling of 248781 in words is "two hundred forty-eight thousand, seven hundred eighty-one".