25544539 has 2 divisors, whose sum is σ = 25544540. Its totient is φ = 25544538.

The previous prime is 25544507. The next prime is 25544573. The reversal of 25544539 is 93544552.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 25544539 - 2⁵ = 25544507 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 25544498 and 25544507.

It is not a weakly prime, because it can be changed into another prime (25544579) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12772269 + 12772270.

It is an arithmetic number, because the mean of its divisors is an integer number (12772270).

Almost surely, 2^25544539 is an apocalyptic number.

25544539 is a deficient number, since it is larger than the sum of its proper divisors (1).

25544539 is an equidigital number, since it uses as much as digits as its factorization.

25544539 is an evil number, because the sum of its binary digits is even.

The product of its digits is 108000, while the sum is 37.

The square root of 25544539 is about 5054.1605633379. The cubic root of 25544539 is about 294.5095326014.

The spelling of 25544539 in words is "twenty-five million, five hundred forty-four thousand, five hundred thirty-nine".