25120825 has 12 divisors (see below), whose sum is σ = 31212288. Its totient is φ = 20056400.

The previous prime is 25120801. The next prime is 25120829. The reversal of 25120825 is 52802152.

It is not a de Polignac number, because 25120825 - 2⁹ = 25120313 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (25).

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 25120825.

It is not an unprimeable number, because it can be changed into a prime (25120829) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 22224 + ... + 23326.

It is an arithmetic number, because the mean of its divisors is an integer number (2601024).

Almost surely, 2^25120825 is an apocalyptic number.

25120825 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

25120825 is a deficient number, since it is larger than the sum of its proper divisors (6091463).

25120825 is a wasteful number, since it uses less digits than its factorization.

25120825 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2024 (or 2019 counting only the distinct ones).

The product of its (nonzero) digits is 1600, while the sum is 25.

The square root of 25120825 is about 5012.0679364909. The cubic root of 25120825 is about 292.8720762335.

Adding to 25120825 its reverse (52802152), we get a palindrome (77922977).

The spelling of 25120825 in words is "twenty-five million, one hundred twenty thousand, eight hundred twenty-five".