25308025 has 6 divisors (see below), whose sum is σ = 31381982. Its totient is φ = 20246400.

The previous prime is 25308011. The next prime is 25308071. The reversal of 25308025 is 52080352.

It can be written as a sum of positive squares in 3 ways, for example, as 6533136 + 18774889 = 2556^2 + 4333^2 .

It is not a de Polignac number, because 25308025 - 2¹¹ = 25305977 is a prime.

It is a super-2 number, since 2×25308025² = 1280992258801250, which contains 22 as substring.

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: 1012321 = 25308025 / (2 + 5 + 3 + 0 + 8 + 0 + 2 + 5).

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 506136 + ... + 506185.

Almost surely, 2^25308025 is an apocalyptic number.

25308025 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

25308025 is a deficient number, since it is larger than the sum of its proper divisors (6073957).

25308025 is a wasteful number, since it uses less digits than its factorization.

25308025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1012331 (or 1012326 counting only the distinct ones).

The product of its (nonzero) digits is 2400, while the sum is 25.

The square root of 25308025 is about 5030.7082006413. The cubic root of 25308025 is about 293.5977693196.

Adding to 25308025 its reverse (52080352), we get a palindrome (77388377).

It can be divided in two parts, 25 and 308025, that multiplied together give a square (7700625 = 2775²).

The spelling of 25308025 in words is "twenty-five million, three hundred eight thousand, twenty-five".