25220242 has 8 divisors (see below), whose sum is σ = 37854396. Its totient is φ = 12602112.

The previous prime is 25220191. The next prime is 25220257. The reversal of 25220242 is 24202252.

It can be written as a sum of positive squares in 2 ways, for example, as 25210441 + 9801 = 5021^2 + 99^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1378 + ... + 7234.

Almost surely, 2^25220242 is an apocalyptic number.

25220242 is a deficient number, since it is larger than the sum of its proper divisors (12634154).

25220242 is a wasteful number, since it uses less digits than its factorization.

25220242 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8012.

The product of its (nonzero) digits is 640, while the sum is 19.

The square root of 25220242 is about 5021.9759059557. The cubic root of 25220242 is about 293.2579199501.

Adding to 25220242 its reverse (24202252), we get a palindrome (49422494).

The spelling of 25220242 in words is "twenty-five million, two hundred twenty thousand, two hundred forty-two".