25542529 has 2 divisors, whose sum is σ = 25542530. Its totient is φ = 25542528.

The previous prime is 25542527. The next prime is 25542571. The reversal of 25542529 is 92524552.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 18662400 + 6880129 = 4320^2 + 2623^2 .

It is a cyclic number.

It is not a de Polignac number, because 25542529 - 2¹ = 25542527 is a prime.

Together with 25542527, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 25542494 and 25542503.

It is not a weakly prime, because it can be changed into another prime (25542521) 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, 12771264 + 12771265.

It is an arithmetic number, because the mean of its divisors is an integer number (12771265).

Almost surely, 2^25542529 is an apocalyptic number.

It is an amenable number.

25542529 is a deficient number, since it is larger than the sum of its proper divisors (1).

25542529 is an equidigital number, since it uses as much as digits as its factorization.

25542529 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 36000, while the sum is 34.

The square root of 25542529 is about 5053.9617133492. The cubic root of 25542529 is about 294.5018077972.

The spelling of 25542529 in words is "twenty-five million, five hundred forty-two thousand, five hundred twenty-nine".