265265139 has 4 divisors (see below), whose sum is σ = 353686856. Its totient is φ = 176843424.

The previous prime is 265265131. The next prime is 265265153. The reversal of 265265139 is 931562562.

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

It is not a de Polignac number, because 265265139 - 2³ = 265265131 is a prime.

It is a Duffinian number.

It is a zygodrome in base 2.

It is a junction number, because it is equal to n+sod(n) for n = 265265097 and 265265106.

It is not an unprimeable number, because it can be changed into a prime (265265131) 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, 44210854 + ... + 44210859.

It is an arithmetic number, because the mean of its divisors is an integer number (88421714).

Almost surely, 2^265265139 is an apocalyptic number.

265265139 is a deficient number, since it is larger than the sum of its proper divisors (88421717).

265265139 is an equidigital number, since it uses as much as digits as its factorization.

265265139 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 88421716.

The product of its digits is 97200, while the sum is 39.

The square root of 265265139 is about 16286.9622397794. The cubic root of 265265139 is about 642.5299750332.

The spelling of 265265139 in words is "two hundred sixty-five million, two hundred sixty-five thousand, one hundred thirty-nine".