25325021 has 2 divisors, whose sum is σ = 25325022. Its totient is φ = 25325020.

The previous prime is 25325017. The next prime is 25325023. The reversal of 25325021 is 12052352.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 23872996 + 1452025 = 4886^2 + 1205^2 .

It is a cyclic number.

It is not a de Polignac number, because 25325021 - 2² = 25325017 is a prime.

Together with 25325023, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 25324984 and 25325002.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25325023) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12662510 + 12662511.

It is an arithmetic number, because the mean of its divisors is an integer number (12662511).

Almost surely, 2^25325021 is an apocalyptic number.

It is an amenable number.

25325021 is a deficient number, since it is larger than the sum of its proper divisors (1).

25325021 is an equidigital number, since it uses as much as digits as its factorization.

25325021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 600, while the sum is 20.

The square root of 25325021 is about 5032.3971425157. The cubic root of 25325021 is about 293.6634780038.

Adding to 25325021 its reverse (12052352), we get a palindrome (37377373).

The spelling of 25325021 in words is "twenty-five million, three hundred twenty-five thousand, twenty-one".