25008520 has 16 divisors (see below), whose sum is σ = 56269260. Its totient is φ = 10003392.

The previous prime is 25008517. The next prime is 25008523. The reversal of 25008520 is 2580052.

It is an interprime number because it is at equal distance from previous prime (25008517) and next prime (25008523).

It can be written as a sum of positive squares in 2 ways, for example, as 24265476 + 743044 = 4926^2 + 862^2 .

It is a junction number, because it is equal to n+sod(n) for n = 25008491 and 25008500.

It is not an unprimeable number, because it can be changed into a prime (25008523) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 312567 + ... + 312646.

Almost surely, 2^25008520 is an apocalyptic number.

25008520 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

25008520 is an abundant number, since it is smaller than the sum of its proper divisors (31260740).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

25008520 is a wasteful number, since it uses less digits than its factorization.

25008520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 625224 (or 625220 counting only the distinct ones).

The product of its (nonzero) digits is 800, while the sum is 22.

The square root of 25008520 is about 5000.8519274220. The cubic root of 25008520 is about 292.4349868901.

Adding to 25008520 its reverse (2580052), we get a palindrome (27588572).

The spelling of 25008520 in words is "twenty-five million, eight thousand, five hundred twenty".