25106225 has 24 divisors (see below), whose sum is σ = 33212160. Its totient is φ = 18782720.

The previous prime is 25106203. The next prime is 25106231. The reversal of 25106225 is 52260152.

It is a de Polignac number, because none of the positive numbers 2^k-25106225 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (23).

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 25106225.

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, 26561 + ... + 27489.

It is an arithmetic number, because the mean of its divisors is an integer number (1383840).

Almost surely, 2^25106225 is an apocalyptic number.

25106225 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

25106225 is a deficient number, since it is larger than the sum of its proper divisors (8105935).

25106225 is a wasteful number, since it uses less digits than its factorization.

25106225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1009 (or 1004 counting only the distinct ones).

The product of its (nonzero) digits is 1200, while the sum is 23.

The square root of 25106225 is about 5010.6112401582. The cubic root of 25106225 is about 292.8153270230.

Adding to 25106225 its reverse (52260152), we get a palindrome (77366377).

The spelling of 25106225 in words is "twenty-five million, one hundred six thousand, two hundred twenty-five".