25478449 has 8 divisors (see below), whose sum is σ = 27059040. Its totient is φ = 23921856.

The previous prime is 25478437. The next prime is 25478471. The reversal of 25478449 is 94487452.

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 25478449 - 2⁵ = 25478417 is a prime.

It is not an unprimeable number, because it can be changed into a prime (25478429) 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, 3787 + ... + 8080.

It is an arithmetic number, because the mean of its divisors is an integer number (3382380).

Almost surely, 2^25478449 is an apocalyptic number.

It is an amenable number.

25478449 is a deficient number, since it is larger than the sum of its proper divisors (1580591).

25478449 is a wasteful number, since it uses less digits than its factorization.

25478449 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11999.

The product of its digits is 322560, while the sum is 43.

The square root of 25478449 is about 5047.6181511679. The cubic root of 25478449 is about 294.2553237293.

The spelling of 25478449 in words is "twenty-five million, four hundred seventy-eight thousand, four hundred forty-nine".