81492 has 12 divisors (see below), whose sum is σ = 190176. Its totient is φ = 27160.

The previous prime is 81463. The next prime is 81509. The reversal of 81492 is 29418.

It is a tau number, because it is divible by the number of its divisors (12).

It is an alternating number because its digits alternate between even and odd.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 81492.

It is an unprimeable number.

81492 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 in 3 ways as a sum of consecutive naturals, for example, 3384 + ... + 3407.

It is an arithmetic number, because the mean of its divisors is an integer number (15848).

2⁸¹⁴⁹² is an apocalyptic number.

It is an amenable number.

81492 is an abundant number, since it is smaller than the sum of its proper divisors (108684).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

It is a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (95088).

81492 is a wasteful number, since it uses less digits than its factorization.

81492 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6798 (or 6796 counting only the distinct ones).

The product of its digits is 576, while the sum is 24.

The square root of 81492 is about 285.4680367397. The cubic root of 81492 is about 43.3549136429.

The spelling of 81492 in words is "eighty-one thousand, four hundred ninety-two".