275565 has 8 divisors (see below), whose sum is σ = 440928. Its totient is φ = 146960.

The previous prime is 275549. The next prime is 275573. The reversal of 275565 is 565572.

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

It is not a de Polignac number, because 275565 - 2⁴ = 275549 is a prime.

It is a plaindrome in base 12.

It is a congruent number.

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, 9171 + ... + 9200.

It is an arithmetic number, because the mean of its divisors is an integer number (55116).

2²⁷⁵⁵⁶⁵ is an apocalyptic number.

It is an amenable number.

275565 is a deficient number, since it is larger than the sum of its proper divisors (165363).

275565 is a wasteful number, since it uses less digits than its factorization.

275565 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18379.

The product of its digits is 10500, while the sum is 30.

The square root of 275565 is about 524.9428540327. The cubic root of 275565 is about 65.0740772814.

The spelling of 275565 in words is "two hundred seventy-five thousand, five hundred sixty-five".