12378725 has 6 divisors (see below), whose sum is σ = 15349650. Its totient is φ = 9902960.

The previous prime is 12378713. The next prime is 12378727. The reversal of 12378725 is 52787321.

It can be written as a sum of positive squares in 3 ways, for example, as 2401 + 12376324 = 49^2 + 3518^2 .

It is not a de Polignac number, because 12378725 - 2¹² = 12374629 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12378727) 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 5 ways as a sum of consecutive naturals, for example, 247550 + ... + 247599.

It is an arithmetic number, because the mean of its divisors is an integer number (2558275).

Almost surely, 2^12378725 is an apocalyptic number.

It is an amenable number.

12378725 is a deficient number, since it is larger than the sum of its proper divisors (2970925).

12378725 is an equidigital number, since it uses as much as digits as its factorization.

12378725 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 495159 (or 495154 counting only the distinct ones).

The product of its digits is 23520, while the sum is 35.

The square root of 12378725 is about 3518.3412284769. The cubic root of 12378725 is about 231.3264563358.

The spelling of 12378725 in words is "twelve million, three hundred seventy-eight thousand, seven hundred twenty-five".