6348921 has 4 divisors (see below), whose sum is σ = 8465232. Its totient is φ = 4232612.

The previous prime is 6348917. The next prime is 6348971. The reversal of 6348921 is 1298436.

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 6348921 - 2² = 6348917 is a prime.

It is an Ulam number.

It is a D-number.

It is not an unprimeable number, because it can be changed into a prime (6348971) 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, 1058151 + ... + 1058156.

It is an arithmetic number, because the mean of its divisors is an integer number (2116308).

Almost surely, 2^6348921 is an apocalyptic number.

It is an amenable number.

6348921 is a deficient number, since it is larger than the sum of its proper divisors (2116311).

6348921 is a wasteful number, since it uses less digits than its factorization.

6348921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2116310.

The product of its digits is 10368, while the sum is 33.

The square root of 6348921 is about 2519.7065305309. The cubic root of 6348921 is about 185.1683007040.

It can be divided in two parts, 63 and 48921, that added together give a palindrome (48984).

The spelling of 6348921 in words is "six million, three hundred forty-eight thousand, nine hundred twenty-one".