25204525 has 6 divisors (see below), whose sum is σ = 31253642. Its totient is φ = 20163600.

The previous prime is 25204513. The next prime is 25204559. The reversal of 25204525 is 52540252.

It is a happy number.

It can be written as a sum of positive squares in 3 ways, for example, as 1798281 + 23406244 = 1341^2 + 4838^2 .

It is not a de Polignac number, because 25204525 - 2¹¹ = 25202477 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (25), and also a Moran number because the ratio is a prime number: 1008181 = 25204525 / (2 + 5 + 2 + 0 + 4 + 5 + 2 + 5).

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 25204525.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 504066 + ... + 504115.

Almost surely, 2^25204525 is an apocalyptic number.

25204525 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

25204525 is a deficient number, since it is larger than the sum of its proper divisors (6049117).

25204525 is a wasteful number, since it uses less digits than its factorization.

25204525 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1008191 (or 1008186 counting only the distinct ones).

The product of its (nonzero) digits is 4000, while the sum is 25.

The square root of 25204525 is about 5020.4108397620. The cubic root of 25204525 is about 293.1969888335.

Adding to 25204525 its reverse (52540252), we get a palindrome (77744777).

The spelling of 25204525 in words is "twenty-five million, two hundred four thousand, five hundred twenty-five".