25378105 has 8 divisors (see below), whose sum is σ = 30723912. Its totient is φ = 20122368.

The previous prime is 25378099. The next prime is 25378109. The reversal of 25378105 is 50187352.

It can be written as a sum of positive squares in 4 ways, for example, as 1201216 + 24176889 = 1096^2 + 4917^2 .

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 25378105 - 2³ = 25378097 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25378109) 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, 21894 + ... + 23023.

It is an arithmetic number, because the mean of its divisors is an integer number (3840489).

Almost surely, 2^25378105 is an apocalyptic number.

It is an amenable number.

25378105 is a deficient number, since it is larger than the sum of its proper divisors (5345807).

25378105 is a wasteful number, since it uses less digits than its factorization.

25378105 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45035.

The product of its (nonzero) digits is 8400, while the sum is 31.

The square root of 25378105 is about 5037.6686076001. The cubic root of 25378105 is about 293.8685183441.

The spelling of 25378105 in words is "twenty-five million, three hundred seventy-eight thousand, one hundred five".