25225121 has 4 divisors (see below), whose sum is σ = 25423872. Its totient is φ = 25026372.

The previous prime is 25225117. The next prime is 25225129. The reversal of 25225121 is 12152252.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 25225121 - 2² = 25225117 is a prime.

It is a super-3 number, since 3×25225121³ (a number of 23 digits) contains 333 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 25225093 and 25225102.

It is not an unprimeable number, because it can be changed into a prime (25225129) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 99185 + ... + 99438.

It is an arithmetic number, because the mean of its divisors is an integer number (6355968).

Almost surely, 2^25225121 is an apocalyptic number.

It is an amenable number.

25225121 is a deficient number, since it is larger than the sum of its proper divisors (198751).

25225121 is a wasteful number, since it uses less digits than its factorization.

25225121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 198750.

The product of its digits is 400, while the sum is 20.

The square root of 25225121 is about 5022.4616474394. The cubic root of 25225121 is about 293.2768295378.

Adding to 25225121 its reverse (12152252), we get a palindrome (37377373).

The spelling of 25225121 in words is "twenty-five million, two hundred twenty-five thousand, one hundred twenty-one".