6441403 has 4 divisors (see below), whose sum is σ = 6721488. Its totient is φ = 6161320.

The previous prime is 6441389. The next prime is 6441427. The reversal of 6441403 is 3041446.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3041446 = 2 ⋅1520723.

It is a cyclic number.

It is not a de Polignac number, because 6441403 - 2⁵ = 6441371 is a prime.

It is a Smith number, since the sum of its digits (22) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is an Ulam number.

It is a Duffinian number.

6441403 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (6441433) 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, 140008 + ... + 140053.

It is an arithmetic number, because the mean of its divisors is an integer number (1680372).

Almost surely, 2^6441403 is an apocalyptic number.

6441403 is a deficient number, since it is larger than the sum of its proper divisors (280085).

6441403 is a wasteful number, since it uses less digits than its factorization.

6441403 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 280084.

The product of its (nonzero) digits is 1152, while the sum is 22.

The square root of 6441403 is about 2537.9919227610. The cubic root of 6441403 is about 186.0630591291.

Adding to 6441403 its reverse (3041446), we get a palindrome (9482849).

The spelling of 6441403 in words is "six million, four hundred forty-one thousand, four hundred three".