12687545 has 8 divisors (see below), whose sum is σ = 16396296. Its totient is φ = 9369216.

The previous prime is 12687541. The next prime is 12687551. The reversal of 12687545 is 54578621.

It can be written as a sum of positive squares in 4 ways, for example, as 212521 + 12475024 = 461^2 + 3532^2 .

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 12687545 - 2² = 12687541 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12687499 and 12687508.

It is not an unprimeable number, because it can be changed into a prime (12687541) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 97532 + ... + 97661.

It is an arithmetic number, because the mean of its divisors is an integer number (2049537).

Almost surely, 2^12687545 is an apocalyptic number.

It is an amenable number.

12687545 is a deficient number, since it is larger than the sum of its proper divisors (3708751).

12687545 is a wasteful number, since it uses less digits than its factorization.

12687545 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 195211.

The product of its digits is 67200, while the sum is 38.

The square root of 12687545 is about 3561.9580289498. The cubic root of 12687545 is about 233.2343605190.

The spelling of 12687545 in words is "twelve million, six hundred eighty-seven thousand, five hundred forty-five".