6405261 has 16 divisors (see below), whose sum is σ = 9085440. Its totient is φ = 4002480.

The previous prime is 6405221. The next prime is 6405263. The reversal of 6405261 is 1625046.

6405261 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is a de Polignac number, because none of the positive numbers 2^k-6405261 is a prime.

6405261 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6405263) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5326 + ... + 6416.

It is an arithmetic number, because the mean of its divisors is an integer number (567840).

Almost surely, 2^6405261 is an apocalyptic number.

It is an amenable number.

6405261 is a deficient number, since it is larger than the sum of its proper divisors (2680179).

6405261 is a wasteful number, since it uses less digits than its factorization.

6405261 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1216.

The product of its (nonzero) digits is 1440, while the sum is 24.

The square root of 6405261 is about 2530.8617109593. The cubic root of 6405261 is about 185.7144131585.

It can be divided in two parts, 6405 and 261, that added together give a palindrome (6666).

The spelling of 6405261 in words is "six million, four hundred five thousand, two hundred sixty-one".