265013405 has 4 divisors (see below), whose sum is σ = 318016092. Its totient is φ = 212010720.

The previous prime is 265013347. The next prime is 265013453. The reversal of 265013405 is 504310562.

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 189723076 + 75290329 = 13774^2 + 8677^2 .

It is not a de Polignac number, because 265013405 - 2²⁰ = 263964829 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

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 in 3 ways as a sum of consecutive naturals, for example, 26501336 + ... + 26501345.

It is an arithmetic number, because the mean of its divisors is an integer number (79504023).

Almost surely, 2^265013405 is an apocalyptic number.

It is an amenable number.

265013405 is a deficient number, since it is larger than the sum of its proper divisors (53002687).

265013405 is an equidigital number, since it uses as much as digits as its factorization.

265013405 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53002686.

The product of its (nonzero) digits is 3600, while the sum is 26.

The square root of 265013405 is about 16279.2323221950. The cubic root of 265013405 is about 642.3266591688.

Adding to 265013405 its reverse (504310562), we get a palindrome (769323967).

The spelling of 265013405 in words is "two hundred sixty-five million, thirteen thousand, four hundred five".