25307242 has 4 divisors (see below), whose sum is σ = 37960866. Its totient is φ = 12653620.

The previous prime is 25307213. The next prime is 25307257. The reversal of 25307242 is 24270352.

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., 15752961 + 9554281 = 3969^2 + 3091^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6326809 + ... + 6326812.

Almost surely, 2^25307242 is an apocalyptic number.

25307242 is a deficient number, since it is larger than the sum of its proper divisors (12653624).

25307242 is a wasteful number, since it uses less digits than its factorization.

25307242 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12653623.

The product of its (nonzero) digits is 3360, while the sum is 25.

The square root of 25307242 is about 5030.6303779944. The cubic root of 25307242 is about 293.5947414338.

Adding to 25307242 its reverse (24270352), we get a palindrome (49577594).

The spelling of 25307242 in words is "twenty-five million, three hundred seven thousand, two hundred forty-two".