25253247 has 4 divisors (see below), whose sum is σ = 33671000. Its totient is φ = 16835496.

The previous prime is 25253243. The next prime is 25253273. The reversal of 25253247 is 74235252.

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

It is not a de Polignac number, because 25253247 - 2² = 25253243 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25253243) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4208872 + ... + 4208877.

It is an arithmetic number, because the mean of its divisors is an integer number (8417750).

Almost surely, 2^25253247 is an apocalyptic number.

25253247 is a deficient number, since it is larger than the sum of its proper divisors (8417753).

25253247 is an equidigital number, since it uses as much as digits as its factorization.

25253247 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8417752.

The product of its digits is 16800, while the sum is 30.

The square root of 25253247 is about 5025.2608887500. The cubic root of 25253247 is about 293.3857902340.

Adding to 25253247 its reverse (74235252), we get a palindrome (99488499).

The spelling of 25253247 in words is "twenty-five million, two hundred fifty-three thousand, two hundred forty-seven".