12687061 has 4 divisors (see below), whose sum is σ = 12865824. Its totient is φ = 12508300.

The previous prime is 12687047. The next prime is 12687067. The reversal of 12687061 is 16078621.

12687061 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 12687061 - 2⁹ = 12686549 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12687067) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 89275 + ... + 89416.

It is an arithmetic number, because the mean of its divisors is an integer number (3216456).

Almost surely, 2^12687061 is an apocalyptic number.

It is an amenable number.

12687061 is a deficient number, since it is larger than the sum of its proper divisors (178763).

12687061 is an equidigital number, since it uses as much as digits as its factorization.

12687061 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 178762.

The product of its (nonzero) digits is 4032, while the sum is 31.

The square root of 12687061 is about 3561.8900881414. The cubic root of 12687061 is about 233.2313947006.

The spelling of 12687061 in words is "twelve million, six hundred eighty-seven thousand, sixty-one".