265399 has 2 divisors, whose sum is σ = 265400. Its totient is φ = 265398.

The previous prime is 265381. The next prime is 265403. The reversal of 265399 is 993562.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 265399 - 2⁷ = 265271 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (265339) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 132699 + 132700.

It is an arithmetic number, because the mean of its divisors is an integer number (132700).

2²⁶⁵³⁹⁹ is an apocalyptic number.

265399 is a deficient number, since it is larger than the sum of its proper divisors (1).

265399 is an equidigital number, since it uses as much as digits as its factorization.

265399 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 14580, while the sum is 34.

The square root of 265399 is about 515.1689043411. The cubic root of 265399 is about 64.2638037029.

The spelling of 265399 in words is "two hundred sixty-five thousand, three hundred ninety-nine".