12289487 has 16 divisors (see below), whose sum is σ = 15124032. Its totient is φ = 9745920.

The previous prime is 12289471. The next prime is 12289493. The reversal of 12289487 is 78498221.

It is a cyclic number.

It is not a de Polignac number, because 12289487 - 2⁴ = 12289471 is a prime.

It is a Smith number, since the sum of its digits (41) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12289427) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6413 + ... + 8105.

It is an arithmetic number, because the mean of its divisors is an integer number (945252).

Almost surely, 2^12289487 is an apocalyptic number.

12289487 is a gapful number since it is divisible by the number (17) formed by its first and last digit.

12289487 is a deficient number, since it is larger than the sum of its proper divisors (2834545).

12289487 is a wasteful number, since it uses less digits than its factorization.

12289487 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1778.

The product of its digits is 64512, while the sum is 41.

The square root of 12289487 is about 3505.6364614717. The cubic root of 12289487 is about 230.7692391424.

The spelling of 12289487 in words is "twelve million, two hundred eighty-nine thousand, four hundred eighty-seven".