25878125 has 54 divisors (see below), whose sum is σ = 40743486. Its totient is φ = 16380000.

The previous prime is 25878107. The next prime is 25878143. The reversal of 25878125 is 52187852.

It is a happy number.

It is a powerful number, because all its prime factors have an exponent greater than 1 and also an Achilles number because it is not a perfect power.

It is an interprime number because it is at equal distance from previous prime (25878107) and next prime (25878143).

It can be written as a sum of positive squares in 9 ways, for example, as 22791076 + 3087049 = 4774^2 + 1757^2 .

It is not a de Polignac number, because 25878125 - 2⁸ = 25877869 is a prime.

It is an alternating number because its digits alternate between even and odd.

Its product of digits (44800) is a multiple of the sum of its prime divisors (25).

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 53 ways as a sum of consecutive naturals, for example, 1990619 + ... + 1990631.

It is an arithmetic number, because the mean of its divisors is an integer number (754509).

Almost surely, 2^25878125 is an apocalyptic number.

25878125 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

25878125 is a deficient number, since it is larger than the sum of its proper divisors (14865361).

25878125 is an frugal number, since it uses more digits than its factorization.

25878125 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 65 (or 25 counting only the distinct ones).

The product of its digits is 44800, while the sum is 38.

The square root of 25878125 is about 5087.0546488120. The cubic root of 25878125 is about 295.7859916750.

The spelling of 25878125 in words is "twenty-five million, eight hundred seventy-eight thousand, one hundred twenty-five".