81275 has 6 divisors (see below), whose sum is σ = 100812. Its totient is φ = 65000.

The previous prime is 81239. The next prime is 81281. The reversal of 81275 is 57218.

It is not a de Polignac number, because 81275 - 2⁸ = 81019 is a prime.

It is a d-powerful number, because it can be written as 8² + 1 + 2¹⁶ + 7² + 5⁶ .

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 81275.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1601 + ... + 1650.

It is an arithmetic number, because the mean of its divisors is an integer number (16802).

2⁸¹²⁷⁵ is an apocalyptic number.

81275 is a deficient number, since it is larger than the sum of its proper divisors (19537).

81275 is a wasteful number, since it uses less digits than its factorization.

81275 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3261 (or 3256 counting only the distinct ones).

The product of its digits is 560, while the sum is 23.

The square root of 81275 is about 285.0877058030. The cubic root of 81275 is about 43.3163970633.

The spelling of 81275 in words is "eighty-one thousand, two hundred seventy-five".