25555005 has 48 divisors (see below), whose sum is σ = 52276224. Its totient is φ = 11301120.

The previous prime is 25554989. The next prime is 25555007. The reversal of 25555005 is 50055552.

It is a happy number.

It is not a de Polignac number, because 25555005 - 2⁴ = 25554989 is a prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 25555005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25555007) 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 47 ways as a sum of consecutive naturals, for example, 8457 + ... + 11073.

It is an arithmetic number, because the mean of its divisors is an integer number (1089088).

Almost surely, 2^25555005 is an apocalyptic number.

It is an amenable number.

25555005 is an abundant number, since it is smaller than the sum of its proper divisors (26721219).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

25555005 is a wasteful number, since it uses less digits than its factorization.

25555005 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2666 (or 2663 counting only the distinct ones).

The product of its (nonzero) digits is 6250, while the sum is 27.

The square root of 25555005 is about 5055.1958419037. The cubic root of 25555005 is about 294.5497488410.

The spelling of 25555005 in words is "twenty-five million, five hundred fifty-five thousand, five".