12525678 has 84 divisors (see below), whose sum is σ = 31399704. Its totient is φ = 3742200.

The previous prime is 12525677. The next prime is 12525691. The reversal of 12525678 is 87652521.

It is a happy number.

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

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12525673) 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 41 ways as a sum of consecutive naturals, for example, 176383 + ... + 176453.

It is an arithmetic number, because the mean of its divisors is an integer number (373806).

Almost surely, 2^12525678 is an apocalyptic number.

12525678 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 12525678, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (15699852).

12525678 is an abundant number, since it is smaller than the sum of its proper divisors (18874026).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

12525678 is an equidigital number, since it uses as much as digits as its factorization.

12525678 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 113 (or 87 counting only the distinct ones).

The product of its digits is 33600, while the sum is 36.

The square root of 12525678 is about 3539.1634604805. The cubic root of 12525678 is about 232.2382486118.

It can be divided in two parts, 12525 and 678, that added together give a triangular number (13203 = T₁₆₂).

The spelling of 12525678 in words is "twelve million, five hundred twenty-five thousand, six hundred seventy-eight".