8025421 has 2 divisors, whose sum is σ = 8025422. Its totient is φ = 8025420.

The previous prime is 8025389. The next prime is 8025439. The reversal of 8025421 is 1245208.

8025421 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 6702921 + 1322500 = 2589^2 + 1150^2 .

It is a cyclic number.

It is not a de Polignac number, because 8025421 - 2⁵ = 8025389 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 8025392 and 8025401.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (8025491) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4012710 + 4012711.

It is an arithmetic number, because the mean of its divisors is an integer number (4012711).

Almost surely, 2^8025421 is an apocalyptic number.

It is an amenable number.

8025421 is a deficient number, since it is larger than the sum of its proper divisors (1).

8025421 is an equidigital number, since it uses as much as digits as its factorization.

8025421 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 640, while the sum is 22.

The square root of 8025421 is about 2832.9174008432. The cubic root of 8025421 is about 200.2116176775.

The spelling of 8025421 in words is "eight million, twenty-five thousand, four hundred twenty-one".