81148 has 6 divisors (see below), whose sum is σ = 142016. Its totient is φ = 40572.

The previous prime is 81131. The next prime is 81157. The reversal of 81148 is 84118.

It is a congruent number.

It is an unprimeable number.

81148 is an untouchable number, because it is not equal to the sum of proper divisors of any 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 as a sum of consecutive naturals, namely, 10140 + ... + 10147.

2⁸¹¹⁴⁸ is an apocalyptic number.

It is an amenable number.

81148 is a deficient number, since it is larger than the sum of its proper divisors (60868).

81148 is a wasteful number, since it uses less digits than its factorization.

81148 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20291 (or 20289 counting only the distinct ones).

The product of its digits is 256, while the sum is 22.

The square root of 81148 is about 284.8648802503. The cubic root of 81148 is about 43.2938232900.

It can be divided in two parts, 8 and 1148, that added together give a square (1156 = 34²).

The spelling of 81148 in words is "eighty-one thousand, one hundred forty-eight".