12987494 has 8 divisors (see below), whose sum is σ = 20979840. Its totient is φ = 5994216.

The previous prime is 12987467. The next prime is 12987497. The reversal of 12987494 is 49478921.

It is a sphenic number, since it is the product of 3 distinct primes.

It is an alternating number because its digits alternate between odd and even.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12987497) 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, 249734 + ... + 249785.

It is an arithmetic number, because the mean of its divisors is an integer number (2622480).

Almost surely, 2^12987494 is an apocalyptic number.

12987494 is a deficient number, since it is larger than the sum of its proper divisors (7992346).

12987494 is a wasteful number, since it uses less digits than its factorization.

12987494 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 499534.

The product of its digits is 145152, while the sum is 44.

The square root of 12987494 is about 3603.8165880078. The cubic root of 12987494 is about 235.0580451154.

The spelling of 12987494 in words is "twelve million, nine hundred eighty-seven thousand, four hundred ninety-four".