25537529 has 2 divisors, whose sum is σ = 25537530. Its totient is φ = 25537528.

The previous prime is 25537513. The next prime is 25537531. The reversal of 25537529 is 92573552.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 25482304 + 55225 = 5048^2 + 235^2 .

It is a cyclic number.

It is not a de Polignac number, because 25537529 - 2⁴ = 25537513 is a prime.

Together with 25537531, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 25537492 and 25537501.

It is not a weakly prime, because it can be changed into another prime (25537549) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12768764 + 12768765.

It is an arithmetic number, because the mean of its divisors is an integer number (12768765).

Almost surely, 2^25537529 is an apocalyptic number.

It is an amenable number.

25537529 is a deficient number, since it is larger than the sum of its proper divisors (1).

25537529 is an equidigital number, since it uses as much as digits as its factorization.

25537529 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 94500, while the sum is 38.

The square root of 25537529 is about 5053.4670276949. The cubic root of 25537529 is about 294.4825901083.

The spelling of 25537529 in words is "twenty-five million, five hundred thirty-seven thousand, five hundred twenty-nine".