25152521 has 2 divisors, whose sum is σ = 25152522. Its totient is φ = 25152520.

The previous prime is 25152511. The next prime is 25152527. The reversal of 25152521 is 12525152.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 24641296 + 511225 = 4964^2 + 715^2 .

It is a cyclic number.

It is not a de Polignac number, because 25152521 - 2¹⁸ = 24890377 is a prime.

It is not a weakly prime, because it can be changed into another prime (25152527) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12576260 + 12576261.

It is an arithmetic number, because the mean of its divisors is an integer number (12576261).

Almost surely, 2^25152521 is an apocalyptic number.

It is an amenable number.

25152521 is a deficient number, since it is larger than the sum of its proper divisors (1).

25152521 is an equidigital number, since it uses as much as digits as its factorization.

25152521 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1000, while the sum is 23.

The square root of 25152521 is about 5015.2289080360. The cubic root of 25152521 is about 292.9952007973.

Adding to 25152521 its reverse (12525152), we get a palindrome (37677673).

The spelling of 25152521 in words is "twenty-five million, one hundred fifty-two thousand, five hundred twenty-one".