6712921 has 2 divisors, whose sum is σ = 6712922. Its totient is φ = 6712920.

The previous prime is 6712913. The next prime is 6712933. The reversal of 6712921 is 1292176.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 6702921 + 10000 = 2589^2 + 100^2 .

It is a cyclic number.

It is not a de Polignac number, because 6712921 - 2³ = 6712913 is a prime.

It is equal to p₄₅₈₃₃₅ and since 6712921 and 458335 have the same sum of digits, it is a Honaker prime.

It is a self number, because there is not a number n which added to its sum of digits gives 6712921.

It is not a weakly prime, because it can be changed into another prime (6712421) 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 as a sum of consecutive naturals, namely, 3356460 + 3356461.

It is an arithmetic number, because the mean of its divisors is an integer number (3356461).

Almost surely, 2^6712921 is an apocalyptic number.

It is an amenable number.

6712921 is a deficient number, since it is larger than the sum of its proper divisors (1).

6712921 is an equidigital number, since it uses as much as digits as its factorization.

6712921 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1512, while the sum is 28.

The square root of 6712921 is about 2590.9305278220. The cubic root of 6712921 is about 188.6414729241.

The spelling of 6712921 in words is "six million, seven hundred twelve thousand, nine hundred twenty-one".