6434521 has 4 divisors (see below), whose sum is σ = 6773200. Its totient is φ = 6095844.

The previous prime is 6434489. The next prime is 6434531. The reversal of 6434521 is 1254346.

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 6434521 - 2⁵ = 6434489 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6434531) 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, 169311 + ... + 169348.

It is an arithmetic number, because the mean of its divisors is an integer number (1693300).

Almost surely, 2^6434521 is an apocalyptic number.

It is an amenable number.

6434521 is a deficient number, since it is larger than the sum of its proper divisors (338679).

6434521 is a wasteful number, since it uses less digits than its factorization.

6434521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 338678.

The product of its digits is 2880, while the sum is 25.

The square root of 6434521 is about 2536.6357641569. The cubic root of 6434521 is about 185.9967722105.

Adding to 6434521 its reverse (1254346), we get a palindrome (7688867).

The spelling of 6434521 in words is "six million, four hundred thirty-four thousand, five hundred twenty-one".