248409 has 12 divisors (see below), whose sum is σ = 410176. Its totient is φ = 141912.

The previous prime is 248407. The next prime is 248431. The reversal of 248409 is 904842.

It is not a de Polignac number, because 248409 - 2¹ = 248407 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (248401) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1909 + ... + 2034.

2²⁴⁸⁴⁰⁹ is an apocalyptic number.

It is an amenable number.

248409 is a deficient number, since it is larger than the sum of its proper divisors (161767).

248409 is a wasteful number, since it uses less digits than its factorization.

248409 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3956 (or 3953 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 27.

The square root of 248409 is about 498.4064606323. The cubic root of 248409 is about 62.8621323765.

The spelling of 248409 in words is "two hundred forty-eight thousand, four hundred nine".