6421541 has 4 divisors (see below), whose sum is σ = 7338912. Its totient is φ = 5504172.

The previous prime is 6421523. The next prime is 6421559. The reversal of 6421541 is 1451246.

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.

It is an interprime number because it is at equal distance from previous prime (6421523) and next prime (6421559).

It is a cyclic number.

It is not a de Polignac number, because 6421541 - 2⁶ = 6421477 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6421511) 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, 458675 + ... + 458688.

It is an arithmetic number, because the mean of its divisors is an integer number (1834728).

Almost surely, 2^6421541 is an apocalyptic number.

It is an amenable number.

6421541 is a deficient number, since it is larger than the sum of its proper divisors (917371).

6421541 is an equidigital number, since it uses as much as digits as its factorization.

6421541 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 917370.

The product of its digits is 960, while the sum is 23.

The square root of 6421541 is about 2534.0759657122. The cubic root of 6421541 is about 185.8716210509.

Adding to 6421541 its reverse (1451246), we get a palindrome (7872787).

The spelling of 6421541 in words is "six million, four hundred twenty-one thousand, five hundred forty-one".