265943 has 4 divisors (see below), whose sum is σ = 279960. Its totient is φ = 251928.

The previous prime is 265921. The next prime is 265957. The reversal of 265943 is 349562.

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

It is a cyclic number.

It is not a de Polignac number, because 265943 - 2¹⁰ = 264919 is a prime.

It is a d-powerful number, because it can be written as 2³ + 6 + 9⁴ + 5⁷ + 4⁶ + 3¹¹ .

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (265543) 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, 6980 + ... + 7017.

It is an arithmetic number, because the mean of its divisors is an integer number (69990).

2²⁶⁵⁹⁴³ is an apocalyptic number.

265943 is a deficient number, since it is larger than the sum of its proper divisors (14017).

265943 is a wasteful number, since it uses less digits than its factorization.

265943 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14016.

The product of its digits is 6480, while the sum is 29.

The square root of 265943 is about 515.6966162387. The cubic root of 265943 is about 64.3076818516.

The spelling of 265943 in words is "two hundred sixty-five thousand, nine hundred forty-three".