6403243 has 16 divisors (see below), whose sum is σ = 8054784. Its totient is φ = 4944960.

The previous prime is 6403219. The next prime is 6403273. The reversal of 6403243 is 3423046.

It is a cyclic number.

It is not a de Polignac number, because 6403243 - 2⁹ = 6402731 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6403273) 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, 10246 + ... + 10852.

It is an arithmetic number, because the mean of its divisors is an integer number (503424).

Almost surely, 2^6403243 is an apocalyptic number.

6403243 is a deficient number, since it is larger than the sum of its proper divisors (1651541).

6403243 is a wasteful number, since it uses less digits than its factorization.

6403243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 762.

The product of its (nonzero) digits is 1728, while the sum is 22.

The square root of 6403243 is about 2530.4630011126. The cubic root of 6403243 is about 185.6949077837.

Adding to 6403243 its reverse (3423046), we get a palindrome (9826289).

It can be divided in two parts, 640 and 3243, that added together give a palindrome (3883).

The spelling of 6403243 in words is "six million, four hundred three thousand, two hundred forty-three".