25349447 has 4 divisors (see below), whose sum is σ = 25360896. Its totient is φ = 25338000.

The previous prime is 25349419. The next prime is 25349449. The reversal of 25349447 is 74494352.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 25349447 - 2¹⁰ = 25348423 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 25349447.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25349449) 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, 1223 + ... + 7224.

It is an arithmetic number, because the mean of its divisors is an integer number (6340224).

Almost surely, 2^25349447 is an apocalyptic number.

25349447 is a deficient number, since it is larger than the sum of its proper divisors (11449).

25349447 is an equidigital number, since it uses as much as digits as its factorization.

25349447 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11448.

The product of its digits is 120960, while the sum is 38.

The square root of 25349447 is about 5034.8234328524. The cubic root of 25349447 is about 293.7578605411.

The spelling of 25349447 in words is "twenty-five million, three hundred forty-nine thousand, four hundred forty-seven".