10025621 has 2 divisors, whose sum is σ = 10025622. Its totient is φ = 10025620.

The previous prime is 10025599. The next prime is 10025623. The reversal of 10025621 is 12652001.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 7623121 + 2402500 = 2761^2 + 1550^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-10025621 is a prime.

It is a Sophie Germain prime.

Together with 10025623, it forms a pair of twin primes.

It is a Chen prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 10025621.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (10025623) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5012810 + 5012811.

It is an arithmetic number, because the mean of its divisors is an integer number (5012811).

Almost surely, 2^10025621 is an apocalyptic number.

It is an amenable number.

10025621 is a deficient number, since it is larger than the sum of its proper divisors (1).

10025621 is an equidigital number, since it uses as much as digits as its factorization.

10025621 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 120, while the sum is 17.

The square root of 10025621 is about 3166.3261044940. The cubic root of 10025621 is about 215.6273079918.

Adding to 10025621 its reverse (12652001), we get a palindrome (22677622).

The spelling of 10025621 in words is "ten million, twenty-five thousand, six hundred twenty-one".