81124 has 12 divisors (see below), whose sum is σ = 150444. Its totient is φ = 38144.

The previous prime is 81119. The next prime is 81131. The reversal of 81124 is 42118.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 52900 + 28224 = 230^2 + 168^2 .

It is a super-2 number, since 2×81124² = 13162206752, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 81098 and 81107.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 529 + ... + 664.

It is an arithmetic number, because the mean of its divisors is an integer number (12537).

2⁸¹¹²⁴ is an apocalyptic number.

It is an amenable number.

81124 is a deficient number, since it is larger than the sum of its proper divisors (69320).

81124 is a wasteful number, since it uses less digits than its factorization.

81124 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1214 (or 1212 counting only the distinct ones).

The product of its digits is 64, while the sum is 16.

The square root of 81124 is about 284.8227519002. The cubic root of 81124 is about 43.2895547345.

The spelling of 81124 in words is "eighty-one thousand, one hundred twenty-four".