25410521 has 2 divisors, whose sum is σ = 25410522. Its totient is φ = 25410520.

The previous prime is 25410499. The next prime is 25410557. The reversal of 25410521 is 12501452.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 19456921 + 5953600 = 4411^2 + 2440^2 .

It is a cyclic number.

It is not a de Polignac number, because 25410521 - 2⁶ = 25410457 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 = 25410493 and 25410502.

It is not a weakly prime, because it can be changed into another prime (25418521) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12705260 + 12705261.

It is an arithmetic number, because the mean of its divisors is an integer number (12705261).

Almost surely, 2^25410521 is an apocalyptic number.

It is an amenable number.

25410521 is a deficient number, since it is larger than the sum of its proper divisors (1).

25410521 is an equidigital number, since it uses as much as digits as its factorization.

25410521 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 400, while the sum is 20.

The square root of 25410521 is about 5040.8849421505. The cubic root of 25410521 is about 293.9935866372.

Adding to 25410521 its reverse (12501452), we get a palindrome (37911973).

The spelling of 25410521 in words is "twenty-five million, four hundred ten thousand, five hundred twenty-one".