25202005 has 4 divisors (see below), whose sum is σ = 30242412. Its totient is φ = 20161600.

The previous prime is 25201993. The next prime is 25202029. The reversal of 25202005 is 50020252.

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 18740241 + 6461764 = 4329^2 + 2542^2 .

It is not a de Polignac number, because 25202005 - 2¹¹ = 25199957 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 25202005.

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, 2520196 + ... + 2520205.

It is an arithmetic number, because the mean of its divisors is an integer number (7560603).

Almost surely, 2^25202005 is an apocalyptic number.

It is an amenable number.

25202005 is a deficient number, since it is larger than the sum of its proper divisors (5040407).

25202005 is an equidigital number, since it uses as much as digits as its factorization.

25202005 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5040406.

The product of its (nonzero) digits is 200, while the sum is 16.

The square root of 25202005 is about 5020.1598580125. The cubic root of 25202005 is about 293.1872170295.

Adding to 25202005 its reverse (50020252), we get a palindrome (75222257).

The spelling of 25202005 in words is "twenty-five million, two hundred two thousand, five".