6240405 has 32 divisors (see below), whose sum is σ = 10442880. Its totient is φ = 3179520.

The previous prime is 6240401. The next prime is 6240407. The reversal of 6240405 is 5040426.

It is a happy number.

It is not a de Polignac number, because 6240405 - 2² = 6240401 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6240401) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 44826 + ... + 44964.

It is an arithmetic number, because the mean of its divisors is an integer number (326340).

Almost surely, 2^6240405 is an apocalyptic number.

It is an amenable number.

6240405 is a deficient number, since it is larger than the sum of its proper divisors (4202475).

6240405 is a wasteful number, since it uses less digits than its factorization.

6240405 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 261.

The product of its (nonzero) digits is 960, while the sum is 21.

The square root of 6240405 is about 2498.0802629219. The cubic root of 6240405 is about 184.1072645678.

Adding to 6240405 its sum of digits (21), we get a palindrome (6240426).

The spelling of 6240405 in words is "six million, two hundred forty thousand, four hundred five".