6732421 has 4 divisors (see below), whose sum is σ = 6875712. Its totient is φ = 6589132.

The previous prime is 6732373. The next prime is 6732449. The reversal of 6732421 is 1242376.

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 a cyclic number.

It is not a de Polignac number, because 6732421 - 2⁷ = 6732293 is a prime.

It is a d-powerful number, because it can be written as 6⁸ + 7⁷ + 3⁷ + 2 + 4¹¹ + 2¹⁵ + 1 .

It is a Duffinian number.

6732421 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6732461) 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, 71575 + ... + 71668.

It is an arithmetic number, because the mean of its divisors is an integer number (1718928).

Almost surely, 2^6732421 is an apocalyptic number.

It is an amenable number.

6732421 is a deficient number, since it is larger than the sum of its proper divisors (143291).

6732421 is a wasteful number, since it uses less digits than its factorization.

6732421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 143290.

The product of its digits is 2016, while the sum is 25.

The square root of 6732421 is about 2594.6909257174. The cubic root of 6732421 is about 188.8239544710.

Adding to 6732421 its reverse (1242376), we get a palindrome (7974797).

The spelling of 6732421 in words is "six million, seven hundred thirty-two thousand, four hundred twenty-one".