265135397 has 4 divisors (see below), whose sum is σ = 271602156. Its totient is φ = 258668640.

The previous prime is 265135363. The next prime is 265135399. The reversal of 265135397 is 793531562.

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 4990756 + 260144641 = 2234^2 + 16129^2 .

It is a cyclic number.

It is not a de Polignac number, because 265135397 - 2⁶ = 265135333 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (41), and also a Moran number because the ratio is a prime number: 6466717 = 265135397 / (2 + 6 + 5 + 1 + 3 + 5 + 3 + 9 + 7).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (265135399) 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, 3233318 + ... + 3233399.

It is an arithmetic number, because the mean of its divisors is an integer number (67900539).

Almost surely, 2^265135397 is an apocalyptic number.

It is an amenable number.

265135397 is a deficient number, since it is larger than the sum of its proper divisors (6466759).

265135397 is an equidigital number, since it uses as much as digits as its factorization.

265135397 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6466758.

The product of its digits is 170100, while the sum is 41.

The square root of 265135397 is about 16282.9787508306. The cubic root of 265135397 is about 642.4252034839.

The spelling of 265135397 in words is "two hundred sixty-five million, one hundred thirty-five thousand, three hundred ninety-seven".