25500643 has 8 divisors (see below), whose sum is σ = 29192288. Its totient is φ = 21821184.

The previous prime is 25500617. The next prime is 25500653. The reversal of 25500643 is 34600552.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 25500643 - 2⁵ = 25500611 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25500613) 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 7 ways as a sum of consecutive naturals, for example, 2005 + ... + 7417.

It is an arithmetic number, because the mean of its divisors is an integer number (3649036).

Almost surely, 2^25500643 is an apocalyptic number.

25500643 is a deficient number, since it is larger than the sum of its proper divisors (3691645).

25500643 is an equidigital number, since it uses as much as digits as its factorization.

25500643 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6093.

The product of its (nonzero) digits is 3600, while the sum is 25.

The square root of 25500643 is about 5049.8161352667. The cubic root of 25500643 is about 294.3407398038.

Subtracting 25500643 from its reverse (34600552), we obtain a palindrome (9099909).

The spelling of 25500643 in words is "twenty-five million, five hundred thousand, six hundred forty-three".