265906 has 4 divisors (see below), whose sum is σ = 398862. Its totient is φ = 132952.

The previous prime is 265891. The next prime is 265921. The reversal of 265906 is 609562.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 609562 = 2 ⋅304781.

It is an interprime number because it is at equal distance from previous prime (265891) and next prime (265921).

It can be written as a sum of positive squares in only one way, i.e., 210681 + 55225 = 459^2 + 235^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 66475 + ... + 66478.

2²⁶⁵⁹⁰⁶ is an apocalyptic number.

265906 is a deficient number, since it is larger than the sum of its proper divisors (132956).

265906 is a wasteful number, since it uses less digits than its factorization.

265906 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 132955.

The product of its (nonzero) digits is 3240, while the sum is 28.

The square root of 265906 is about 515.6607411855. The cubic root of 265906 is about 64.3046993898.

The spelling of 265906 in words is "two hundred sixty-five thousand, nine hundred six".