25855955 has 4 divisors (see below), whose sum is σ = 31027152. Its totient is φ = 20684760.

The previous prime is 25855939. The next prime is 25855957. The reversal of 25855955 is 55955852.

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

It is not a de Polignac number, because 25855955 - 2⁴ = 25855939 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25855957) 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, 2585591 + ... + 2585600.

It is an arithmetic number, because the mean of its divisors is an integer number (7756788).

Almost surely, 2^25855955 is an apocalyptic number.

25855955 is a deficient number, since it is larger than the sum of its proper divisors (5171197).

25855955 is an equidigital number, since it uses as much as digits as its factorization.

25855955 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5171196.

The product of its digits is 450000, while the sum is 44.

The square root of 25855955 is about 5084.8751213771. The cubic root of 25855955 is about 295.7015001212.

The spelling of 25855955 in words is "twenty-five million, eight hundred fifty-five thousand, nine hundred fifty-five".