248957281 has 4 divisors (see below), whose sum is σ = 248999364. Its totient is φ = 248915200.

The previous prime is 248957279. The next prime is 248957321. The reversal of 248957281 is 182759842.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 182759842 = 2 ⋅91379921.

It can be written as a sum of positive squares in 2 ways, for example, as 41165056 + 207792225 = 6416^2 + 14415^2 .

It is a cyclic number.

It is not a de Polignac number, because 248957281 - 2¹ = 248957279 is a prime.

It is a super-2 number, since 2×248957281² = 123959455525825922, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (248957381) 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, 10360 + ... + 24601.

It is an arithmetic number, because the mean of its divisors is an integer number (62249841).

Almost surely, 2^248957281 is an apocalyptic number.

It is an amenable number.

248957281 is a deficient number, since it is larger than the sum of its proper divisors (42083).

248957281 is an equidigital number, since it uses as much as digits as its factorization.

248957281 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42082.

The product of its digits is 322560, while the sum is 46.

The square root of 248957281 is about 15778.3801766848. The cubic root of 248957281 is about 629.0834753818.

The spelling of 248957281 in words is "two hundred forty-eight million, nine hundred fifty-seven thousand, two hundred eighty-one".