25985507 has 4 divisors (see below), whose sum is σ = 26687856. Its totient is φ = 25283160.

The previous prime is 25985489. The next prime is 25985551. The reversal of 25985507 is 70558952.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 25985507 - 2¹² = 25981411 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25985107) 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 in 3 ways as a sum of consecutive naturals, for example, 351119 + ... + 351192.

It is an arithmetic number, because the mean of its divisors is an integer number (6671964).

Almost surely, 2^25985507 is an apocalyptic number.

25985507 is a deficient number, since it is larger than the sum of its proper divisors (702349).

25985507 is an equidigital number, since it uses as much as digits as its factorization.

25985507 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 702348.

The product of its (nonzero) digits is 126000, while the sum is 41.

The square root of 25985507 is about 5097.5981599181. The cubic root of 25985507 is about 296.1945511539.

The spelling of 25985507 in words is "twenty-five million, nine hundred eighty-five thousand, five hundred seven".