25757225 has 24 divisors (see below), whose sum is σ = 35252952. Its totient is φ = 18547200.

The previous prime is 25757213. The next prime is 25757231. The reversal of 25757225 is 52275752.

It can be written as a sum of positive squares in 12 ways, for example, as 16289296 + 9467929 = 4036^2 + 3077^2 .

It is not a de Polignac number, because 25757225 - 2¹⁸ = 25495081 is a prime.

It is a Smith number, since the sum of its digits (35) coincides with the sum of the digits of its prime factors.

It is a Duffinian number.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 12359 + ... + 14291.

It is an arithmetic number, because the mean of its divisors is an integer number (1468873).

Almost surely, 2^25757225 is an apocalyptic number.

25757225 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

25757225 is a deficient number, since it is larger than the sum of its proper divisors (9495727).

25757225 is a wasteful number, since it uses less digits than its factorization.

25757225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1997 (or 1992 counting only the distinct ones).

The product of its digits is 49000, while the sum is 35.

The square root of 25757225 is about 5075.1576330199. The cubic root of 25757225 is about 295.3246449938.

The spelling of 25757225 in words is "twenty-five million, seven hundred fifty-seven thousand, two hundred twenty-five".