25447479 has 8 divisors (see below), whose sum is σ = 35715840. Its totient is φ = 16072056.

The previous prime is 25447451. The next prime is 25447501. The reversal of 25447479 is 97474452.

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

It is not a de Polignac number, because 25447479 - 2⁵ = 25447447 is a prime.

It is a Smith number, since the sum of its digits (42) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a self number, because there is not a number n which added to its sum of digits gives 25447479.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25447439) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 223167 + ... + 223280.

It is an arithmetic number, because the mean of its divisors is an integer number (4464480).

Almost surely, 2^25447479 is an apocalyptic number.

25447479 is a deficient number, since it is larger than the sum of its proper divisors (10268361).

25447479 is a wasteful number, since it uses less digits than its factorization.

25447479 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 446469.

The product of its digits is 282240, while the sum is 42.

The square root of 25447479 is about 5044.5494347860. The cubic root of 25447479 is about 294.1360493011.

The spelling of 25447479 in words is "twenty-five million, four hundred forty-seven thousand, four hundred seventy-nine".