181265 has 8 divisors (see below), whose sum is σ = 248640. Its totient is φ = 124272.

The previous prime is 181253. The next prime is 181273. The reversal of 181265 is 562181.

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

It is a cyclic number.

It is not a de Polignac number, because 181265 - 2⁶ = 181201 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 181265.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 181265.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2555 + ... + 2624.

It is an arithmetic number, because the mean of its divisors is an integer number (31080).

2¹⁸¹²⁶⁵ is an apocalyptic number.

It is an amenable number.

181265 is a deficient number, since it is larger than the sum of its proper divisors (67375).

181265 is an equidigital number, since it uses as much as digits as its factorization.

181265 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5191.

The product of its digits is 480, while the sum is 23.

The square root of 181265 is about 425.7522753903. The cubic root of 181265 is about 56.5941209291.

The spelling of 181265 in words is "one hundred eighty-one thousand, two hundred sixty-five".