248557 has 4 divisors (see below), whose sum is σ = 263196. Its totient is φ = 233920.

The previous prime is 248543. The next prime is 248569. The reversal of 248557 is 755842.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 67081 + 181476 = 259^2 + 426^2 .

It is not a de Polignac number, because 248557 - 2¹¹ = 246509 is a prime.

It is a Duffinian number.

It is a nialpdrome in base 12.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (248537) 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, 7294 + ... + 7327.

It is an arithmetic number, because the mean of its divisors is an integer number (65799).

248557 is a Friedman number, since it can be written as (8+4)^5-275, using all its digits and the basic arithmetic operations.

2²⁴⁸⁵⁵⁷ is an apocalyptic number.

It is an amenable number.

248557 is a deficient number, since it is larger than the sum of its proper divisors (14639).

248557 is a wasteful number, since it uses less digits than its factorization.

248557 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14638.

The product of its digits is 11200, while the sum is 31.

The square root of 248557 is about 498.5549117199. The cubic root of 248557 is about 62.8746141418.

The spelling of 248557 in words is "two hundred forty-eight thousand, five hundred fifty-seven".