6423641 has 8 divisors (see below), whose sum is σ = 7512384. Its totient is φ = 5377680.

The previous prime is 6423629. The next prime is 6423643. The reversal of 6423641 is 1463246.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a de Polignac number, because none of the positive numbers 2^k-6423641 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 6423641.

It is not an unprimeable number, because it can be changed into a prime (6423643) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10370 + ... + 10971.

It is an arithmetic number, because the mean of its divisors is an integer number (939048).

Almost surely, 2^6423641 is an apocalyptic number.

It is an amenable number.

6423641 is a deficient number, since it is larger than the sum of its proper divisors (1088743).

6423641 is a wasteful number, since it uses less digits than its factorization.

6423641 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21391.

The product of its digits is 3456, while the sum is 26.

The square root of 6423641 is about 2534.4902840611. The cubic root of 6423641 is about 185.8918803554.

Adding to 6423641 its reverse (1463246), we get a palindrome (7886887).

The spelling of 6423641 in words is "six million, four hundred twenty-three thousand, six hundred forty-one".