248665 has 8 divisors (see below), whose sum is σ = 305928. Its totient is φ = 193920.

The previous prime is 248657. The next prime is 248683. The reversal of 248665 is 566842.

248665 = T₈₉ + T₉₀ + ... + T₁₂₉.

It can be written as a sum of positive squares in 4 ways, for example, as 15376 + 233289 = 124^2 + 483^2 .

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

It is not a de Polignac number, because 248665 - 2³ = 248657 is a prime.

It is a Duffinian number.

It is a plaindrome in base 14.

It is a nialpdrome in base 12.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 402 + ... + 811.

It is an arithmetic number, because the mean of its divisors is an integer number (38241).

2²⁴⁸⁶⁶⁵ is an apocalyptic number.

It is an amenable number.

248665 is a deficient number, since it is larger than the sum of its proper divisors (57263).

248665 is a wasteful number, since it uses less digits than its factorization.

248665 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1259.

The product of its digits is 11520, while the sum is 31.

The square root of 248665 is about 498.6632130005. The cubic root of 248665 is about 62.8837193304.

The spelling of 248665 in words is "two hundred forty-eight thousand, six hundred sixty-five".