6721198 has 32 divisors (see below), whose sum is σ = 11819520. Its totient is φ = 2835360.

The previous prime is 6721189. The next prime is 6721199. The reversal of 6721198 is 8911276.

It is a happy number.

Its product of digits (6048) is a multiple of the sum of its prime divisors (432).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6721199) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 18543 + ... + 18901.

It is an arithmetic number, because the mean of its divisors is an integer number (369360).

Almost surely, 2^6721198 is an apocalyptic number.

6721198 is a deficient number, since it is larger than the sum of its proper divisors (5098322).

6721198 is a wasteful number, since it uses less digits than its factorization.

6721198 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 432.

The product of its digits is 6048, while the sum is 34.

The square root of 6721198 is about 2592.5273383322. The cubic root of 6721198 is about 188.7189724301.

The spelling of 6721198 in words is "six million, seven hundred twenty-one thousand, one hundred ninety-eight".