275961 has 16 divisors (see below), whose sum is σ = 445824. Its totient is φ = 148224.

The previous prime is 275941. The next prime is 275963. The reversal of 275961 is 169572.

It is not a de Polignac number, because 275961 - 2⁵ = 275929 is a prime.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 275961.

It is not an unprimeable number, because it can be changed into a prime (275963) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 30 + ... + 743.

It is an arithmetic number, because the mean of its divisors is an integer number (27864).

2²⁷⁵⁹⁶¹ is an apocalyptic number.

275961 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

275961 is a deficient number, since it is larger than the sum of its proper divisors (169863).

275961 is a wasteful number, since it uses less digits than its factorization.

275961 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 800.

The product of its digits is 3780, while the sum is 30.

The square root of 275961 is about 525.3199025356. The cubic root of 275961 is about 65.1052338755.

The spelling of 275961 in words is "two hundred seventy-five thousand, nine hundred sixty-one".