275643 has 20 divisors (see below), whose sum is σ = 426888. Its totient is φ = 177120.

The previous prime is 275641. The next prime is 275651. The reversal of 275643 is 346572.

It is a happy number.

It is not a de Polignac number, because 275643 - 2¹ = 275641 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (275641) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 3280 + ... + 3362.

2²⁷⁵⁶⁴³ is an apocalyptic number.

275643 is a deficient number, since it is larger than the sum of its proper divisors (151245).

275643 is an equidigital number, since it uses as much as digits as its factorization.

275643 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 136 (or 127 counting only the distinct ones).

The product of its digits is 5040, while the sum is 27.

The square root of 275643 is about 525.0171425773. The cubic root of 275643 is about 65.0802165458.

The spelling of 275643 in words is "two hundred seventy-five thousand, six hundred forty-three".