25787505 has 16 divisors (see below), whose sum is σ = 42591744. Its totient is φ = 13309440.

The previous prime is 25787501. The next prime is 25787507. The reversal of 25787505 is 50578752.

It is not a de Polignac number, because 25787505 - 2² = 25787501 is a prime.

It is not an unprimeable number, because it can be changed into a prime (25787501) 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 in 15 ways as a sum of consecutive naturals, for example, 27264 + ... + 28193.

It is an arithmetic number, because the mean of its divisors is an integer number (2661984).

Almost surely, 2^25787505 is an apocalyptic number.

It is an amenable number.

25787505 is a deficient number, since it is larger than the sum of its proper divisors (16804239).

25787505 is a wasteful number, since it uses less digits than its factorization.

25787505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55496.

The product of its (nonzero) digits is 98000, while the sum is 39.

The square root of 25787505 is about 5078.1399153627. The cubic root of 25787505 is about 295.4403268180.

The spelling of 25787505 in words is "twenty-five million, seven hundred eighty-seven thousand, five hundred five".