81297 has 8 divisors (see below), whose sum is σ = 120480. Its totient is φ = 54180.

The previous prime is 81293. The next prime is 81299. The reversal of 81297 is 79218.

It is not a de Polignac number, because 81297 - 2² = 81293 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27), and also a Moran number because the ratio is a prime number: 3011 = 81297 / (8 + 1 + 2 + 9 + 7).

It is a self number, because there is not a number n which added to its sum of digits gives 81297.

It is not an unprimeable number, because it can be changed into a prime (81293) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1479 + ... + 1532.

It is an arithmetic number, because the mean of its divisors is an integer number (15060).

2⁸¹²⁹⁷ is an apocalyptic number.

It is an amenable number.

81297 is a deficient number, since it is larger than the sum of its proper divisors (39183).

81297 is a wasteful number, since it uses less digits than its factorization.

81297 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3020 (or 3014 counting only the distinct ones).

The product of its digits is 1008, while the sum is 27.

The square root of 81297 is about 285.1262878095. The cubic root of 81297 is about 43.3203050907.

It can be divided in two parts, 812 and 97, that added together give a palindrome (909).

The spelling of 81297 in words is "eighty-one thousand, two hundred ninety-seven".