12787061 has 4 divisors (see below), whose sum is σ = 14613792. Its totient is φ = 10960332.

The previous prime is 12787051. The next prime is 12787067. The reversal of 12787061 is 16078721.

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 12787061 - 2⁶ = 12786997 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12787067) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 913355 + ... + 913368.

It is an arithmetic number, because the mean of its divisors is an integer number (3653448).

Almost surely, 2^12787061 is an apocalyptic number.

It is an amenable number.

12787061 is a deficient number, since it is larger than the sum of its proper divisors (1826731).

12787061 is an equidigital number, since it uses as much as digits as its factorization.

12787061 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1826730.

The product of its (nonzero) digits is 4704, while the sum is 32.

The square root of 12787061 is about 3575.9000265667. The cubic root of 12787061 is about 233.8425719301.

The spelling of 12787061 in words is "twelve million, seven hundred eighty-seven thousand, sixty-one".