12487249 has 8 divisors (see below), whose sum is σ = 12755880. Its totient is φ = 12220800.

The previous prime is 12487217. The next prime is 12487253. The reversal of 12487249 is 94278421.

12487249 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 3294225 + 9193024 = 1815^2 + 3032^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 12487249 - 2⁵ = 12487217 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12487949) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16029 + ... + 16789.

It is an arithmetic number, because the mean of its divisors is an integer number (1594485).

Almost surely, 2^12487249 is an apocalyptic number.

It is an amenable number.

12487249 is a deficient number, since it is larger than the sum of its proper divisors (268631).

12487249 is an equidigital number, since it uses as much as digits as its factorization.

12487249 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1091.

The product of its digits is 32256, while the sum is 37.

The square root of 12487249 is about 3533.7301821163. The cubic root of 12487249 is about 232.0005016339. Note that the first 3 decimals are identical.

The spelling of 12487249 in words is "twelve million, four hundred eighty-seven thousand, two hundred forty-nine".