6721159 has 2 divisors, whose sum is σ = 6721160. Its totient is φ = 6721158.

The previous prime is 6721157. The next prime is 6721177. The reversal of 6721159 is 9511276.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 6721159 - 2¹ = 6721157 is a prime.

Together with 6721157, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 6721159.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6721153) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3360579 + 3360580.

It is an arithmetic number, because the mean of its divisors is an integer number (3360580).

Almost surely, 2^6721159 is an apocalyptic number.

6721159 is a deficient number, since it is larger than the sum of its proper divisors (1).

6721159 is an equidigital number, since it uses as much as digits as its factorization.

6721159 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3780, while the sum is 31.

The square root of 6721159 is about 2592.5198167034. The cubic root of 6721159 is about 188.7186074131.

The spelling of 6721159 in words is "six million, seven hundred twenty-one thousand, one hundred fifty-nine".