12720487 has 8 divisors (see below), whose sum is σ = 13771296. Its totient is φ = 11680032.

The previous prime is 12720479. The next prime is 12720511. The reversal of 12720487 is 78402721.

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

It is not a de Polignac number, because 12720487 - 2³ = 12720479 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 (12720427) 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 7 ways as a sum of consecutive naturals, for example, 78 + ... + 5044.

It is an arithmetic number, because the mean of its divisors is an integer number (1721412).

Almost surely, 2^12720487 is an apocalyptic number.

12720487 is a deficient number, since it is larger than the sum of its proper divisors (1050809).

12720487 is a wasteful number, since it uses less digits than its factorization.

12720487 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5177.

The product of its (nonzero) digits is 6272, while the sum is 31.

The square root of 12720487 is about 3566.5791733817. The cubic root of 12720487 is about 233.4360429908.

The spelling of 12720487 in words is "twelve million, seven hundred twenty thousand, four hundred eighty-seven".