25580005 has 12 divisors (see below), whose sum is σ = 33741036. Its totient is φ = 18603200.

The previous prime is 25579999. The next prime is 25580021. The reversal of 25580005 is 50008552.

It can be written as a sum of positive squares in 2 ways, for example, as 18783556 + 6796449 = 4334^2 + 2607^2 .

It is not a de Polignac number, because 25580005 - 2¹¹ = 25577957 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 20536 + ... + 21745.

It is an arithmetic number, because the mean of its divisors is an integer number (2811753).

Almost surely, 2^25580005 is an apocalyptic number.

It is an amenable number.

25580005 is a deficient number, since it is larger than the sum of its proper divisors (8161031).

25580005 is a wasteful number, since it uses less digits than its factorization.

25580005 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42308 (or 42297 counting only the distinct ones).

The product of its (nonzero) digits is 2000, while the sum is 25.

The square root of 25580005 is about 5057.6679408597. The cubic root of 25580005 is about 294.6457684368.

Adding to 25580005 its reverse (50008552), we get a palindrome (75588557).

The spelling of 25580005 in words is "twenty-five million, five hundred eighty thousand, five".