265728539 has 2 divisors, whose sum is σ = 265728540. Its totient is φ = 265728538.

The previous prime is 265728521. The next prime is 265728571. The reversal of 265728539 is 935827562.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 265728539 - 2²⁴ = 248951323 is a prime.

It is a super-2 number, since 2×265728539² = 141223312878149042, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 265728493 and 265728502.

It is not a weakly prime, because it can be changed into another prime (265722539) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 132864269 + 132864270.

It is an arithmetic number, because the mean of its divisors is an integer number (132864270).

Almost surely, 2^265728539 is an apocalyptic number.

265728539 is a deficient number, since it is larger than the sum of its proper divisors (1).

265728539 is an equidigital number, since it uses as much as digits as its factorization.

265728539 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 907200, while the sum is 47.

The square root of 265728539 is about 16301.1821350478. The cubic root of 265728539 is about 642.9039093009.

The spelling of 265728539 in words is "two hundred sixty-five million, seven hundred twenty-eight thousand, five hundred thirty-nine".