12180725 has 24 divisors (see below), whose sum is σ = 15969960. Its totient is φ = 9201920.

The previous prime is 12180719. The next prime is 12180743. The reversal of 12180725 is 52708121.

It can be written as a sum of positive squares in 12 ways, for example, as 4831204 + 7349521 = 2198^2 + 2711^2 .

It is a de Polignac number, because none of the positive numbers 2^k-12180725 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 12180694 and 12180703.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 38267 + ... + 38583.

It is an arithmetic number, because the mean of its divisors is an integer number (665415).

Almost surely, 2^12180725 is an apocalyptic number.

It is an amenable number.

12180725 is a deficient number, since it is larger than the sum of its proper divisors (3789235).

12180725 is a wasteful number, since it uses less digits than its factorization.

12180725 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 409 (or 404 counting only the distinct ones).

The product of its (nonzero) digits is 1120, while the sum is 26.

The square root of 12180725 is about 3490.0895403986. The cubic root of 12180725 is about 230.0864514329.

Adding to 12180725 its reverse (52708121), we get a palindrome (64888846).

The spelling of 12180725 in words is "twelve million, one hundred eighty thousand, seven hundred twenty-five".