25506587 has 2 divisors, whose sum is σ = 25506588. Its totient is φ = 25506586.

The previous prime is 25506581. The next prime is 25506619. The reversal of 25506587 is 78560552.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 25506587 - 2¹⁶ = 25441051 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 25506587.

It is not a weakly prime, because it can be changed into another prime (25506581) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12753293 + 12753294.

It is an arithmetic number, because the mean of its divisors is an integer number (12753294).

Almost surely, 2^25506587 is an apocalyptic number.

25506587 is a deficient number, since it is larger than the sum of its proper divisors (1).

25506587 is an equidigital number, since it uses as much as digits as its factorization.

25506587 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 84000, while the sum is 38.

The square root of 25506587 is about 5050.4046372543. The cubic root of 25506587 is about 294.3636075336.

The spelling of 25506587 in words is "twenty-five million, five hundred six thousand, five hundred eighty-seven".