265401 has 12 divisors (see below), whose sum is σ = 394212. Its totient is φ = 171936.

The previous prime is 265399. The next prime is 265403. The reversal of 265401 is 104562.

It is a happy number.

265401 is a `hidden beast` number, since 265 + 401 = 666.

It is an interprime number because it is at equal distance from previous prime (265399) and next prime (265403).

It can be written as a sum of positive squares in 2 ways, for example, as 189225 + 76176 = 435^2 + 276^2 .

It is not a de Polignac number, because 265401 - 2¹ = 265399 is a prime.

It is not an unprimeable number, because it can be changed into a prime (265403) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 66 + ... + 731.

It is an arithmetic number, because the mean of its divisors is an integer number (32851).

2²⁶⁵⁴⁰¹ is an apocalyptic number.

It is an amenable number.

265401 is a deficient number, since it is larger than the sum of its proper divisors (128811).

265401 is a wasteful number, since it uses less digits than its factorization.

265401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 840 (or 837 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 18.

The square root of 265401 is about 515.1708454484. The cubic root of 265401 is about 64.2639651294.

Adding to 265401 its reverse (104562), we get a palindrome (369963).

It can be divided in two parts, 265 and 401, that added together give a palindrome (666).

The spelling of 265401 in words is "two hundred sixty-five thousand, four hundred one".