248761 has 4 divisors (see below), whose sum is σ = 263412. Its totient is φ = 234112.

The previous prime is 248753. The next prime is 248779. The reversal of 248761 is 167842.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 167842 = 2 ⋅83921.

It can be written as a sum of positive squares in 2 ways, for example, as 72361 + 176400 = 269^2 + 420^2 .

It is a cyclic number.

It is not a de Polignac number, because 248761 - 2³ = 248753 is a prime.

It is an Ulam number.

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 (248701) 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, 7300 + ... + 7333.

It is an arithmetic number, because the mean of its divisors is an integer number (65853).

2²⁴⁸⁷⁶¹ is an apocalyptic number.

It is an amenable number.

248761 is a deficient number, since it is larger than the sum of its proper divisors (14651).

248761 is a wasteful number, since it uses less digits than its factorization.

248761 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14650.

The product of its digits is 2688, while the sum is 28.

The square root of 248761 is about 498.7594610631. The cubic root of 248761 is about 62.8918106183.

The spelling of 248761 in words is "two hundred forty-eight thousand, seven hundred sixty-one".