265140289 has 4 divisors (see below), whose sum is σ = 265414320. Its totient is φ = 264866260.

The previous prime is 265140283. The next prime is 265140311. The reversal of 265140289 is 982041562.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 265140289 - 2⁵ = 265140257 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (265140283) 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, 135559 + ... + 137500.

It is an arithmetic number, because the mean of its divisors is an integer number (66353580).

Almost surely, 2^265140289 is an apocalyptic number.

It is an amenable number.

265140289 is a deficient number, since it is larger than the sum of its proper divisors (274031).

265140289 is an equidigital number, since it uses as much as digits as its factorization.

265140289 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 274030.

The product of its (nonzero) digits is 34560, while the sum is 37.

The square root of 265140289 is about 16283.1289683525. The cubic root of 265140289 is about 642.4291545780.

The spelling of 265140289 in words is "two hundred sixty-five million, one hundred forty thousand, two hundred eighty-nine".