25302005 has 4 divisors (see below), whose sum is σ = 30362412. Its totient is φ = 20241600.

The previous prime is 25301993. The next prime is 25302023. The reversal of 25302005 is 50020352.

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 4490161 + 20811844 = 2119^2 + 4562^2 .

It is not a de Polignac number, because 25302005 - 2²² = 21107701 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 3 ways as a sum of consecutive naturals, for example, 2530196 + ... + 2530205.

It is an arithmetic number, because the mean of its divisors is an integer number (7590603).

Almost surely, 2^25302005 is an apocalyptic number.

It is an amenable number.

25302005 is a deficient number, since it is larger than the sum of its proper divisors (5060407).

25302005 is an equidigital number, since it uses as much as digits as its factorization.

25302005 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5060406.

The product of its (nonzero) digits is 300, while the sum is 17.

The square root of 25302005 is about 5030.1098397550. The cubic root of 25302005 is about 293.5744881834.

Adding to 25302005 its reverse (50020352), we get a palindrome (75322357).

The spelling of 25302005 in words is "twenty-five million, three hundred two thousand, five".