6406541 has 4 divisors (see below), whose sum is σ = 6413184. Its totient is φ = 6399900.

The previous prime is 6406529. The next prime is 6406549. The reversal of 6406541 is 1456046.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 6406541 - 2¹⁰ = 6405517 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 6406541.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6406549) 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, 1565 + ... + 3906.

It is an arithmetic number, because the mean of its divisors is an integer number (1603296).

Almost surely, 2^6406541 is an apocalyptic number.

It is an amenable number.

6406541 is a deficient number, since it is larger than the sum of its proper divisors (6643).

6406541 is a wasteful number, since it uses less digits than its factorization.

6406541 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6642.

The product of its (nonzero) digits is 2880, while the sum is 26.

The square root of 6406541 is about 2531.1145766243. The cubic root of 6406541 is about 185.7267831263.

The spelling of 6406541 in words is "six million, four hundred six thousand, five hundred forty-one".