12489487 has 2 divisors, whose sum is σ = 12489488. Its totient is φ = 12489486.

The previous prime is 12489481. The next prime is 12489511. The reversal of 12489487 is 78498421.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 12489487 - 2⁷ = 12489359 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12489481) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6244743 + 6244744.

It is an arithmetic number, because the mean of its divisors is an integer number (6244744).

Almost surely, 2^12489487 is an apocalyptic number.

12489487 is a deficient number, since it is larger than the sum of its proper divisors (1).

12489487 is an equidigital number, since it uses as much as digits as its factorization.

12489487 is an evil number, because the sum of its binary digits is even.

The product of its digits is 129024, while the sum is 43.

The square root of 12489487 is about 3534.0468304764. The cubic root of 12489487 is about 232.0143607341.

The spelling of 12489487 in words is "twelve million, four hundred eighty-nine thousand, four hundred eighty-seven".