10002521 has 2 divisors, whose sum is σ = 10002522. Its totient is φ = 10002520.

The previous prime is 10002481. The next prime is 10002527. The reversal of 10002521 is 12520001.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 6528025 + 3474496 = 2555^2 + 1864^2 .

It is a cyclic number.

It is not a de Polignac number, because 10002521 - 2¹⁸ = 9740377 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (10002527) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5001260 + 5001261.

It is an arithmetic number, because the mean of its divisors is an integer number (5001261).

Almost surely, 2^10002521 is an apocalyptic number.

It is an amenable number.

10002521 is a deficient number, since it is larger than the sum of its proper divisors (1).

10002521 is an equidigital number, since it uses as much as digits as its factorization.

10002521 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 20, while the sum is 11.

The square root of 10002521 is about 3162.6762401485. The cubic root of 10002521 is about 215.4615719149.

Adding to 10002521 its reverse (12520001), we get a palindrome (22522522).

The spelling of 10002521 in words is "ten million, two thousand, five hundred twenty-one".