12489705 has 12 divisors (see below), whose sum is σ = 21648900. Its totient is φ = 6661152.

The previous prime is 12489703. The next prime is 12489709. The reversal of 12489705 is 50798421.

It can be written as a sum of positive squares in 2 ways, for example, as 3326976 + 9162729 = 1824^2 + 3027^2 .

It is not a de Polignac number, because 12489705 - 2¹ = 12489703 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 12489705.

It is not an unprimeable number, because it can be changed into a prime (12489703) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 138730 + ... + 138819.

It is an arithmetic number, because the mean of its divisors is an integer number (1804075).

Almost surely, 2^12489705 is an apocalyptic number.

12489705 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

12489705 is a deficient number, since it is larger than the sum of its proper divisors (9159195).

12489705 is a wasteful number, since it uses less digits than its factorization.

12489705 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 277560 (or 277557 counting only the distinct ones).

The product of its (nonzero) digits is 20160, while the sum is 36.

The square root of 12489705 is about 3534.0776731702. The cubic root of 12489705 is about 232.0157106384.

The spelling of 12489705 in words is "twelve million, four hundred eighty-nine thousand, seven hundred five".