275986 has 4 divisors (see below), whose sum is σ = 413982. Its totient is φ = 137992.

The previous prime is 275981. The next prime is 275987. The reversal of 275986 is 689572.

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

It can be written as a sum of positive squares in only one way, i.e., 275625 + 361 = 525^2 + 19^2 .

It is not an unprimeable number, because it can be changed into a prime (275981) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 68995 + ... + 68998.

2²⁷⁵⁹⁸⁶ is an apocalyptic number.

275986 is a deficient number, since it is larger than the sum of its proper divisors (137996).

275986 is a wasteful number, since it uses less digits than its factorization.

275986 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 137995.

The product of its digits is 30240, while the sum is 37.

The square root of 275986 is about 525.3436970213. The cubic root of 275986 is about 65.1071998317.

The spelling of 275986 in words is "two hundred seventy-five thousand, nine hundred eighty-six".