12489605 has 8 divisors (see below), whose sum is σ = 15097752. Its totient is φ = 9918208.

The previous prime is 12489601. The next prime is 12489613. The reversal of 12489605 is 50698421.

It can be written as a sum of positive squares in 4 ways, for example, as 2211169 + 10278436 = 1487^2 + 3206^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 12489605 - 2² = 12489601 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 (12489601) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8432 + ... + 9801.

It is an arithmetic number, because the mean of its divisors is an integer number (1887219).

Almost surely, 2^12489605 is an apocalyptic number.

It is an amenable number.

12489605 is a deficient number, since it is larger than the sum of its proper divisors (2608147).

12489605 is a wasteful number, since it uses less digits than its factorization.

12489605 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18375.

The product of its (nonzero) digits is 17280, while the sum is 35.

The square root of 12489605 is about 3534.0635251789. The cubic root of 12489605 is about 232.0150914182.

The spelling of 12489605 in words is "twelve million, four hundred eighty-nine thousand, six hundred five".