265940845 has 4 divisors (see below), whose sum is σ = 319129020. Its totient is φ = 212752672.

The previous prime is 265940839. The next prime is 265940861. The reversal of 265940845 is 548049562.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 548049562 = 2 ⋅274024781.

It can be written as a sum of positive squares in 2 ways, for example, as 144456361 + 121484484 = 12019^2 + 11022^2 .

It is a cyclic number.

It is not a de Polignac number, because 265940845 - 2¹¹ = 265938797 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 26594080 + ... + 26594089.

It is an arithmetic number, because the mean of its divisors is an integer number (79782255).

Almost surely, 2^265940845 is an apocalyptic number.

It is an amenable number.

265940845 is a deficient number, since it is larger than the sum of its proper divisors (53188175).

265940845 is an equidigital number, since it uses as much as digits as its factorization.

265940845 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53188174.

The product of its (nonzero) digits is 345600, while the sum is 43.

The square root of 265940845 is about 16307.6928165820. The cubic root of 265940845 is about 643.0750815097.

The spelling of 265940845 in words is "two hundred sixty-five million, nine hundred forty thousand, eight hundred forty-five".