25242447 has 8 divisors (see below), whose sum is σ = 34035120. Its totient is φ = 16639040.

The previous prime is 25242443. The next prime is 25242449. The reversal of 25242447 is 74424252.

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

It is a cyclic number.

It is not a de Polignac number, because 25242447 - 2² = 25242443 is a prime.

It is a super-2 number, since 2×25242447² = 1274362261095618, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25242443) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 47004 + ... + 47537.

It is an arithmetic number, because the mean of its divisors is an integer number (4254390).

Almost surely, 2^25242447 is an apocalyptic number.

25242447 is a deficient number, since it is larger than the sum of its proper divisors (8792673).

25242447 is an equidigital number, since it uses as much as digits as its factorization.

25242447 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 94633.

The product of its digits is 17920, while the sum is 30.

The square root of 25242447 is about 5024.1862027596. The cubic root of 25242447 is about 293.3439603875.

Adding to 25242447 its reverse (74424252), we get a palindrome (99666699).

The spelling of 25242447 in words is "twenty-five million, two hundred forty-two thousand, four hundred forty-seven".