12187500 has 96 divisors (see below), whose sum is σ = 38281152. Its totient is φ = 3000000.

The previous prime is 12187489. The next prime is 12187507. The reversal of 12187500 is 578121.

It is a nialpdrome in base 5.

It is a zygodrome in base 5.

It is a Saint-Exupery number, since it is equal to the product of the sides of a Pythagorean triangle: 325 × 125 × 300.

It is not an unprimeable number, because it can be changed into a prime (12187507) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 937494 + ... + 937506.

It is an arithmetic number, because the mean of its divisors is an integer number (398762).

Almost surely, 2^12187500 is an apocalyptic number.

12187500 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 12187500, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (19140576).

12187500 is an abundant number, since it is smaller than the sum of its proper divisors (26093652).

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

12187500 is an frugal number, since it uses more digits than its factorization.

12187500 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55 (or 23 counting only the distinct ones).

The product of its (nonzero) digits is 560, while the sum is 24.

The square root of 12187500 is about 3491.0600109422. The cubic root of 12187500 is about 230.1291020629.

It can be divided in two parts, 12 and 187500, that multiplied together give a square (2250000 = 1500²).

The spelling of 12187500 in words is "twelve million, one hundred eighty-seven thousand, five hundred".