265049681 has 4 divisors (see below), whose sum is σ = 285438132. Its totient is φ = 244661232.

The previous prime is 265049671. The next prime is 265049683. The reversal of 265049681 is 186940562.

It is a happy number.

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

It can be written as a sum of positive squares in 2 ways, for example, as 11730625 + 253319056 = 3425^2 + 15916^2 .

It is a cyclic number.

It is not a de Polignac number, because 265049681 - 2¹⁴ = 265033297 is a prime.

It is a super-2 number, since 2×265049681² = 140502666796403522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (265049683) 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, 10194206 + ... + 10194231.

It is an arithmetic number, because the mean of its divisors is an integer number (71359533).

Almost surely, 2^265049681 is an apocalyptic number.

It is an amenable number.

265049681 is a deficient number, since it is larger than the sum of its proper divisors (20388451).

265049681 is a wasteful number, since it uses less digits than its factorization.

265049681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20388450.

The product of its (nonzero) digits is 103680, while the sum is 41.

The square root of 265049681 is about 16280.3464643723. The cubic root of 265049681 is about 642.3559658358.

The spelling of 265049681 in words is "two hundred sixty-five million, forty-nine thousand, six hundred eighty-one".