12987043 has 4 divisors (see below), whose sum is σ = 13005088. Its totient is φ = 12969000.

The previous prime is 12987017. The next prime is 12987053. The reversal of 12987043 is 34078921.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 12987043 - 2¹³ = 12978851 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12987053) 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 3 ways as a sum of consecutive naturals, for example, 7896 + ... + 9397.

It is an arithmetic number, because the mean of its divisors is an integer number (3251272).

Almost surely, 2^12987043 is an apocalyptic number.

12987043 is a deficient number, since it is larger than the sum of its proper divisors (18045).

12987043 is an equidigital number, since it uses as much as digits as its factorization.

12987043 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18044.

The product of its (nonzero) digits is 12096, while the sum is 34.

The square root of 12987043 is about 3603.7540149128. The cubic root of 12987043 is about 235.0553242311.

The spelling of 12987043 in words is "twelve million, nine hundred eighty-seven thousand, forty-three".