25478619 has 8 divisors (see below), whose sum is σ = 34547520. Its totient is φ = 16697736.

The previous prime is 25478611. The next prime is 25478623. The reversal of 25478619 is 91687452.

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

It is not a de Polignac number, because 25478619 - 2³ = 25478611 is a prime.

It is a super-2 number, since 2×25478619² = 1298320052294322, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (25478611) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 71797 + ... + 72150.

It is an arithmetic number, because the mean of its divisors is an integer number (4318440).

Almost surely, 2^25478619 is an apocalyptic number.

25478619 is a deficient number, since it is larger than the sum of its proper divisors (9068901).

25478619 is a wasteful number, since it uses less digits than its factorization.

25478619 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 144009.

The product of its digits is 120960, while the sum is 42.

The square root of 25478619 is about 5047.6349907655. The cubic root of 25478619 is about 294.2559781817.

The spelling of 25478619 in words is "twenty-five million, four hundred seventy-eight thousand, six hundred nineteen".