275545 has 4 divisors (see below), whose sum is σ = 330660. Its totient is φ = 220432.

The previous prime is 275543. The next prime is 275549. The reversal of 275545 is 545572.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 170569 + 104976 = 413^2 + 324^2 .

It is a cyclic number.

It is not a de Polignac number, because 275545 - 2¹ = 275543 is a prime.

275545 is a lucky number.

It is a plaindrome in base 15.

It is not an unprimeable number, because it can be changed into a prime (275543) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 27550 + ... + 27559.

It is an arithmetic number, because the mean of its divisors is an integer number (82665).

2²⁷⁵⁵⁴⁵ is an apocalyptic number.

It is an amenable number.

275545 is a deficient number, since it is larger than the sum of its proper divisors (55115).

275545 is an equidigital number, since it uses as much as digits as its factorization.

275545 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55114.

The product of its digits is 7000, while the sum is 28.

The square root of 275545 is about 524.9238039944. The cubic root of 275545 is about 65.0725029245.

It can be divided in two parts, 275 and 545, that added together give a triangular number (820 = T₄₀).

The spelling of 275545 in words is "two hundred seventy-five thousand, five hundred forty-five".