12487865 has 8 divisors (see below), whose sum is σ = 16138248. Its totient is φ = 9221760.

The previous prime is 12487861. The next prime is 12487889. The reversal of 12487865 is 56878421.

It can be written as a sum of positive squares in 4 ways, for example, as 2042041 + 10445824 = 1429^2 + 3232^2 .

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

It is not a de Polignac number, because 12487865 - 2² = 12487861 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12487861) 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, 95996 + ... + 96125.

It is an arithmetic number, because the mean of its divisors is an integer number (2017281).

Almost surely, 2^12487865 is an apocalyptic number.

It is an amenable number.

12487865 is a deficient number, since it is larger than the sum of its proper divisors (3650383).

12487865 is a wasteful number, since it uses less digits than its factorization.

12487865 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 192139.

The product of its digits is 107520, while the sum is 41.

The square root of 12487865 is about 3533.8173410633. The cubic root of 12487865 is about 232.0043164575.

The spelling of 12487865 in words is "twelve million, four hundred eighty-seven thousand, eight hundred sixty-five".