275261 has 4 divisors (see below), whose sum is σ = 314592. Its totient is φ = 235932.

The previous prime is 275251. The next prime is 275263. The reversal of 275261 is 162572.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 275261 - 2¹⁰ = 274237 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (275263) 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, 19655 + ... + 19668.

It is an arithmetic number, because the mean of its divisors is an integer number (78648).

2²⁷⁵²⁶¹ is an apocalyptic number.

It is an amenable number.

275261 is a deficient number, since it is larger than the sum of its proper divisors (39331).

275261 is an equidigital number, since it uses as much as digits as its factorization.

275261 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39330.

The product of its digits is 840, while the sum is 23.

The square root of 275261 is about 524.6532188027. The cubic root of 275261 is about 65.0501388294.

The spelling of 275261 in words is "two hundred seventy-five thousand, two hundred sixty-one".