265040521 has 2 divisors, whose sum is σ = 265040522. Its totient is φ = 265040520.

The previous prime is 265040513. The next prime is 265040533. The reversal of 265040521 is 125040562.

265040521 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 157628025 + 107412496 = 12555^2 + 10364^2 .

It is a cyclic number.

It is not a de Polignac number, because 265040521 - 2³ = 265040513 is a prime.

It is not a weakly prime, because it can be changed into another prime (265040551) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 132520260 + 132520261.

It is an arithmetic number, because the mean of its divisors is an integer number (132520261).

Almost surely, 2^265040521 is an apocalyptic number.

It is an amenable number.

265040521 is a deficient number, since it is larger than the sum of its proper divisors (1).

265040521 is an equidigital number, since it uses as much as digits as its factorization.

265040521 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2400, while the sum is 25.

The square root of 265040521 is about 16280.0651411473. The cubic root of 265040521 is about 642.3485659043.

The spelling of 265040521 in words is "two hundred sixty-five million, forty thousand, five hundred twenty-one".