275905 has 8 divisors (see below), whose sum is σ = 378432. Its totient is φ = 189168.

The previous prime is 275897. The next prime is 275911. The reversal of 275905 is 509572.

275905 is nontrivially palindromic in base 4.

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

It is not a de Polignac number, because 275905 - 2³ = 275897 is a prime.

It is a super-2 number, since 2×275905² = 152247138050, which contains 22 as substring.

It is a Duffinian number.

It is a nialpdrome in base 13.

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, 3907 + ... + 3976.

It is an arithmetic number, because the mean of its divisors is an integer number (47304).

2²⁷⁵⁹⁰⁵ is an apocalyptic number.

It is an amenable number.

275905 is a deficient number, since it is larger than the sum of its proper divisors (102527).

275905 is an equidigital number, since it uses as much as digits as its factorization.

275905 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7895.

The product of its (nonzero) digits is 3150, while the sum is 28.

The square root of 275905 is about 525.2665989762. The cubic root of 275905 is about 65.1008297027.

The spelling of 275905 in words is "two hundred seventy-five thousand, nine hundred five".