25005601 has 4 divisors (see below), whose sum is σ = 25017732. Its totient is φ = 24993472.

The previous prime is 25005587. The next prime is 25005611. The reversal of 25005601 is 10650052.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 2433600 + 22572001 = 1560^2 + 4751^2 .

It is a cyclic number.

It is not a de Polignac number, because 25005601 - 2⁷ = 25005473 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25005611) 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 3 ways as a sum of consecutive naturals, for example, 2116 + ... + 7381.

It is an arithmetic number, because the mean of its divisors is an integer number (6254433).

Almost surely, 2^25005601 is an apocalyptic number.

It is an amenable number.

25005601 is a deficient number, since it is larger than the sum of its proper divisors (12131).

25005601 is an equidigital number, since it uses as much as digits as its factorization.

25005601 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12130.

The product of its (nonzero) digits is 300, while the sum is 19.

The square root of 25005601 is about 5000.5600686323. The cubic root of 25005601 is about 292.4236087552.

Adding to 25005601 its reverse (10650052), we get a palindrome (35655653).

The spelling of 25005601 in words is "twenty-five million, five thousand, six hundred one".