12987061 has 4 divisors (see below), whose sum is σ = 13020172. Its totient is φ = 12953952.

The previous prime is 12987059. The next prime is 12987071. The reversal of 12987061 is 16078921.

It is a happy number.

12987061 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 an emirpimes, since its reverse is a distinct semiprime: 16078921 = 19 ⋅846259.

It can be written as a sum of positive squares in 2 ways, for example, as 7784100 + 5202961 = 2790^2 + 2281^2 .

It is a cyclic number.

It is not a de Polignac number, because 12987061 - 2¹ = 12987059 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 (12987071) 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, 15960 + ... + 16753.

It is an arithmetic number, because the mean of its divisors is an integer number (3255043).

Almost surely, 2^12987061 is an apocalyptic number.

It is an amenable number.

12987061 is a deficient number, since it is larger than the sum of its proper divisors (33111).

12987061 is an equidigital number, since it uses as much as digits as its factorization.

12987061 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33110.

The product of its (nonzero) digits is 6048, while the sum is 34.

The square root of 12987061 is about 3603.7565123077. The cubic root of 12987061 is about 235.0554328264.

The spelling of 12987061 in words is "twelve million, nine hundred eighty-seven thousand, sixty-one".