248817 has 4 divisors (see below), whose sum is σ = 331760.
Its totient is φ = 165876.
The previous prime is 248813. The next prime is 248821. The reversal of 248817 is 718842.
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.
It is an interprime number because it is at equal distance from previous prime (248813) and next prime (248821).
It is not a de Polignac number, because 248817 - 22 = 248813 is a prime.
It is a D-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 (248813) 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, 41467 + ... + 41472.
It is an arithmetic number, because the mean of its divisors is an integer number (82940).
2248817 is an apocalyptic number.
It is an amenable number.
248817 is a deficient number, since it is larger than the sum of its proper divisors (82943).
248817 is an equidigital number, since it uses as much as digits as its factorization.
248817 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 82942.
The product of its digits is 3584, while the sum is 30.
The square root of 248817 is about 498.8155971900.
The cubic root of 248817 is about 62.8965295750.
The spelling of 248817 in words is "two hundred forty-eight thousand, eight hundred seventeen".