6725021 has 2 divisors, whose sum is σ = 6725022. Its totient is φ = 6725020.

The previous prime is 6724999. The next prime is 6725027. The reversal of 6725021 is 1205276.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 5112121 + 1612900 = 2261^2 + 1270^2 .

It is a cyclic number.

It is not a de Polignac number, because 6725021 - 2¹⁸ = 6462877 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6725027) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3362510 + 3362511.

It is an arithmetic number, because the mean of its divisors is an integer number (3362511).

Almost surely, 2^6725021 is an apocalyptic number.

It is an amenable number.

6725021 is a deficient number, since it is larger than the sum of its proper divisors (1).

6725021 is an equidigital number, since it uses as much as digits as its factorization.

6725021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 840, while the sum is 23.

The square root of 6725021 is about 2593.2645449317. The cubic root of 6725021 is about 188.7547466023.

The spelling of 6725021 in words is "six million, seven hundred twenty-five thousand, twenty-one".