25378559 has 4 divisors (see below), whose sum is σ = 26064504. Its totient is φ = 24692616.

The previous prime is 25378541. The next prime is 25378571. The reversal of 25378559 is 95587352.

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

It is not a de Polignac number, because 25378559 - 2¹² = 25374463 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 (25378159) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 342917 + ... + 342990.

It is an arithmetic number, because the mean of its divisors is an integer number (6516126).

Almost surely, 2^25378559 is an apocalyptic number.

25378559 is a deficient number, since it is larger than the sum of its proper divisors (685945).

25378559 is an equidigital number, since it uses as much as digits as its factorization.

25378559 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 685944.

The product of its digits is 378000, while the sum is 44.

The square root of 25378559 is about 5037.7136679252. The cubic root of 25378559 is about 293.8702707144.

The spelling of 25378559 in words is "twenty-five million, three hundred seventy-eight thousand, five hundred fifty-nine".