25261225 has 24 divisors (see below), whose sum is σ = 34560288. Its totient is φ = 18163200.

The previous prime is 25261213. The next prime is 25261267. The reversal of 25261225 is 52216252.

It is a happy number.

It is not a de Polignac number, because 25261225 - 2⁷ = 25261097 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 25261225.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 26202 + ... + 27148.

It is an arithmetic number, because the mean of its divisors is an integer number (1440012).

Almost surely, 2^25261225 is an apocalyptic number.

25261225 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

25261225 is a deficient number, since it is larger than the sum of its proper divisors (9299063).

25261225 is a wasteful number, since it uses less digits than its factorization.

25261225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1065 (or 1060 counting only the distinct ones).

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

The square root of 25261225 is about 5026.0546157001. The cubic root of 25261225 is about 293.4166824383.

Adding to 25261225 its reverse (52216252), we get a palindrome (77477477).

The spelling of 25261225 in words is "twenty-five million, two hundred sixty-one thousand, two hundred twenty-five".