25000621 has 2 divisors, whose sum is σ = 25000622. Its totient is φ = 25000620.

The previous prime is 25000607. The next prime is 25000627. The reversal of 25000621 is 12600052.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 17547721 + 7452900 = 4189^2 + 2730^2 .

It is a cyclic number.

It is not a de Polignac number, because 25000621 - 2⁹ = 25000109 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 25000595 and 25000604.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25000627) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12500310 + 12500311.

It is an arithmetic number, because the mean of its divisors is an integer number (12500311).

Almost surely, 2^25000621 is an apocalyptic number.

It is an amenable number.

25000621 is a deficient number, since it is larger than the sum of its proper divisors (1).

25000621 is an equidigital number, since it uses as much as digits as its factorization.

25000621 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 16.

The square root of 25000621 is about 5000.0620996144. The cubic root of 25000621 is about 292.4041948879.

Adding to 25000621 its reverse (12600052), we get a palindrome (37600673).

The spelling of 25000621 in words is "twenty-five million, six hundred twenty-one", and thus it is an aban number.