81248 has 12 divisors (see below), whose sum is σ = 160020. Its totient is φ = 40608.

The previous prime is 81239. The next prime is 81281. The reversal of 81248 is 84218.

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is an unprimeable number.

81248 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1238 + ... + 1301.

It is an arithmetic number, because the mean of its divisors is an integer number (13335).

2⁸¹²⁴⁸ is an apocalyptic number.

It is an amenable number.

81248 is a deficient number, since it is larger than the sum of its proper divisors (78772).

81248 is a wasteful number, since it uses less digits than its factorization.

81248 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2549 (or 2541 counting only the distinct ones).

The product of its digits is 512, while the sum is 23.

The square root of 81248 is about 285.0403480211. The cubic root of 81248 is about 43.3115998840.

Subtracting from 81248 its sum of digits (23), we obtain a square (81225 = 285²).

The spelling of 81248 in words is "eighty-one thousand, two hundred forty-eight".