25820485 has 4 divisors (see below), whose sum is σ = 30984588. Its totient is φ = 20656384.

The previous prime is 25820479. The next prime is 25820521. The reversal of 25820485 is 58402852.

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

It can be written as a sum of positive squares in 2 ways, for example, as 3833764 + 21986721 = 1958^2 + 4689^2 .

It is a cyclic number.

It is not a de Polignac number, because 25820485 - 2³ = 25820477 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 25820485.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2582044 + ... + 2582053.

It is an arithmetic number, because the mean of its divisors is an integer number (7746147).

Almost surely, 2^25820485 is an apocalyptic number.

It is an amenable number.

25820485 is a deficient number, since it is larger than the sum of its proper divisors (5164103).

25820485 is an equidigital number, since it uses as much as digits as its factorization.

25820485 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5164102.

The product of its (nonzero) digits is 25600, while the sum is 34.

The square root of 25820485 is about 5081.3861297878. The cubic root of 25820485 is about 295.5662207496.

The spelling of 25820485 in words is "twenty-five million, eight hundred twenty thousand, four hundred eighty-five".