9925021 has 2 divisors, whose sum is σ = 9925022. Its totient is φ = 9925020.

The previous prime is 9924997. The next prime is 9925031. The reversal of 9925021 is 1205299.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 9302500 + 622521 = 3050^2 + 789^2 .

It is a cyclic number.

It is not a de Polignac number, because 9925021 - 2¹⁹ = 9400733 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 (9925031) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4962510 + 4962511.

It is an arithmetic number, because the mean of its divisors is an integer number (4962511).

Almost surely, 2^9925021 is an apocalyptic number.

It is an amenable number.

9925021 is a deficient number, since it is larger than the sum of its proper divisors (1).

9925021 is an equidigital number, since it uses as much as digits as its factorization.

9925021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1620, while the sum is 28.

The square root of 9925021 is about 3150.4001333164. The cubic root of 9925021 is about 214.9036597394.

The spelling of 9925021 in words is "nine million, nine hundred twenty-five thousand, twenty-one".