265998 has 16 divisors (see below), whose sum is σ = 544896. Its totient is φ = 86520.

The previous prime is 265987. The next prime is 266003. The reversal of 265998 is 899562.

It is a happy number.

It is a Curzon number.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 265998.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 258 + ... + 773.

It is an arithmetic number, because the mean of its divisors is an integer number (34056).

2²⁶⁵⁹⁹⁸ is an apocalyptic number.

265998 is an abundant number, since it is smaller than the sum of its proper divisors (278898).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

265998 is a wasteful number, since it uses less digits than its factorization.

265998 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1079.

The product of its digits is 38880, while the sum is 39.

The square root of 265998 is about 515.7499394086. The cubic root of 265998 is about 64.3121147297.

The spelling of 265998 in words is "two hundred sixty-five thousand, nine hundred ninety-eight".