25032521 has 2 divisors, whose sum is σ = 25032522. Its totient is φ = 25032520.

The previous prime is 25032457. The next prime is 25032559. The reversal of 25032521 is 12523052.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 15912121 + 9120400 = 3989^2 + 3020^2 .

It is a cyclic number.

It is not a de Polignac number, because 25032521 - 2⁶ = 25032457 is a prime.

It is a Chen prime.

It is an alternating number because its digits alternate between even and odd.

It is a junction number, because it is equal to n+sod(n) for n = 25032493 and 25032502.

It is not a weakly prime, because it can be changed into another prime (25032421) 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, 12516260 + 12516261.

It is an arithmetic number, because the mean of its divisors is an integer number (12516261).

Almost surely, 2^25032521 is an apocalyptic number.

It is an amenable number.

25032521 is a deficient number, since it is larger than the sum of its proper divisors (1).

25032521 is an equidigital number, since it uses as much as digits as its factorization.

25032521 is an odious number, because the sum of its binary digits is odd.

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

The square root of 25032521 is about 5003.2510430719. The cubic root of 25032521 is about 292.5285081913.

Adding to 25032521 its reverse (12523052), we get a palindrome (37555573).

The spelling of 25032521 in words is "twenty-five million, thirty-two thousand, five hundred twenty-one".