25000025 has 12 divisors (see below), whose sum is σ = 31310124. Its totient is φ = 19800000.

The previous prime is 25000009. The next prime is 25000033. The reversal of 25000025 is 52000052.

It can be written as a sum of positive squares in 6 ways, for example, as 4596736 + 20403289 = 2144^2 + 4517^2 .

It is not a de Polignac number, because 25000025 - 2⁴ = 25000009 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 24999973 and 25000009.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2426 + ... + 7475.

It is an arithmetic number, because the mean of its divisors is an integer number (2609177).

Almost surely, 2^25000025 is an apocalyptic number.

25000025 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

25000025 is a deficient number, since it is larger than the sum of its proper divisors (6310099).

25000025 is a wasteful number, since it uses less digits than its factorization.

25000025 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10012 (or 10007 counting only the distinct ones).

The product of its (nonzero) digits is 100, while the sum is 14.

The square root of 25000025 is about 5000.0024999994. The cubic root of 25000025 is about 292.4018712885.

Adding to 25000025 its reverse (52000052), we get a palindrome (77000077).

It can be divided in two parts, 250000 and 25, that multiplied together give a 4-th power (6250000 = 50⁴).

The spelling of 25000025 in words is "twenty-five million, twenty-five", and thus it is an aban number and an uban number.