81146 has 8 divisors (see below), whose sum is σ = 131124. Its totient is φ = 37440.

The previous prime is 81131. The next prime is 81157. The reversal of 81146 is 64118.

It can be written as a sum of positive squares in 2 ways, for example, as 57121 + 24025 = 239^2 + 155^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a Curzon number.

It is an unprimeable 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 in 3 ways as a sum of consecutive naturals, for example, 1535 + ... + 1586.

2⁸¹¹⁴⁶ is an apocalyptic number.

81146 is a deficient number, since it is larger than the sum of its proper divisors (49978).

81146 is a wasteful number, since it uses less digits than its factorization.

81146 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3136.

The product of its digits is 192, while the sum is 20.

The square root of 81146 is about 284.8613697924. The cubic root of 81146 is about 43.2934676092.

It can be divided in two parts, 8114 and 6, that multiplied together give a palindrome (48684).

The spelling of 81146 in words is "eighty-one thousand, one hundred forty-six".