25620487 has 2 divisors, whose sum is σ = 25620488. Its totient is φ = 25620486.

The previous prime is 25620481. The next prime is 25620509. The reversal of 25620487 is 78402652.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-25620487 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25620481) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12810243 + 12810244.

It is an arithmetic number, because the mean of its divisors is an integer number (12810244).

Almost surely, 2^25620487 is an apocalyptic number.

25620487 is a deficient number, since it is larger than the sum of its proper divisors (1).

25620487 is an equidigital number, since it uses as much as digits as its factorization.

25620487 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 26880, while the sum is 34.

The square root of 25620487 is about 5061.6684008339. The cubic root of 25620487 is about 294.8011184629.

The spelling of 25620487 in words is "twenty-five million, six hundred twenty thousand, four hundred eighty-seven".