25678005 has 32 divisors (see below), whose sum is σ = 43186176. Its totient is φ = 13003584.

The previous prime is 25677991. The next prime is 25678019. The reversal of 25678005 is 50087652.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (25677991) and next prime (25678019).

It is not a de Polignac number, because 25678005 - 2⁴ = 25677989 is a prime.

It is a congruent number.

It is an unprimeable number.

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 31 ways as a sum of consecutive naturals, for example, 90594 + ... + 90876.

It is an arithmetic number, because the mean of its divisors is an integer number (1349568).

Almost surely, 2^25678005 is an apocalyptic number.

It is an amenable number.

25678005 is a deficient number, since it is larger than the sum of its proper divisors (17508171).

25678005 is a wasteful number, since it uses less digits than its factorization.

25678005 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 577.

The product of its (nonzero) digits is 16800, while the sum is 33.

The square root of 25678005 is about 5067.3469389810. The cubic root of 25678005 is about 295.0215631083.

It can be divided in two parts, 25 and 678005, that added together give a triangular number (678030 = T₁₁₆₄).

The spelling of 25678005 in words is "twenty-five million, six hundred seventy-eight thousand, five".