25317242 has 4 divisors (see below), whose sum is σ = 37975866. Its totient is φ = 12658620.

The previous prime is 25317221. The next prime is 25317247. The reversal of 25317242 is 24271352.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 24393721 + 923521 = 4939^2 + 961^2 .

It is not an unprimeable number, because it can be changed into a prime (25317247) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6329309 + ... + 6329312.

Almost surely, 2^25317242 is an apocalyptic number.

25317242 is a deficient number, since it is larger than the sum of its proper divisors (12658624).

25317242 is a wasteful number, since it uses less digits than its factorization.

25317242 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12658623.

The product of its digits is 3360, while the sum is 26.

The square root of 25317242 is about 5031.6241910540. The cubic root of 25317242 is about 293.6334070563.

Adding to 25317242 its reverse (24271352), we get a palindrome (49588594).

The spelling of 25317242 in words is "twenty-five million, three hundred seventeen thousand, two hundred forty-two".