25642242 has 12 divisors (see below), whose sum is σ = 55558230. Its totient is φ = 8547408.

The previous prime is 25642231. The next prime is 25642249. The reversal of 25642242 is 24224652.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 15280281 + 10361961 = 3909^2 + 3219^2 .

It is not an unprimeable number, because it can be changed into a prime (25642249) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 712267 + ... + 712302.

Almost surely, 2^25642242 is an apocalyptic number.

25642242 is an abundant number, since it is smaller than the sum of its proper divisors (29915988).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

25642242 is a wasteful number, since it uses less digits than its factorization.

25642242 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1424577 (or 1424574 counting only the distinct ones).

The product of its digits is 7680, while the sum is 27.

The square root of 25642242 is about 5063.8169398192. The cubic root of 25642242 is about 294.8845358719.

Adding to 25642242 its reverse (24224652), we get a palindrome (49866894).

The spelling of 25642242 in words is "twenty-five million, six hundred forty-two thousand, two hundred forty-two".