81342 has 12 divisors (see below), whose sum is σ = 176280. Its totient is φ = 27108.

The previous prime is 81331. The next prime is 81343. The reversal of 81342 is 24318.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (18), and also a Moran number because the ratio is a prime number: 4519 = 81342 / (8 + 1 + 3 + 4 + 2).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (81343) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2242 + ... + 2277.

It is an arithmetic number, because the mean of its divisors is an integer number (14690).

2⁸¹³⁴² is an apocalyptic number.

81342 is an abundant number, since it is smaller than the sum of its proper divisors (94938).

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

81342 is a wasteful number, since it uses less digits than its factorization.

81342 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4527 (or 4524 counting only the distinct ones).

The product of its digits is 192, while the sum is 18.

The square root of 81342 is about 285.2051892936. The cubic root of 81342 is about 43.3282965875.

The spelling of 81342 in words is "eighty-one thousand, three hundred forty-two".