12499605 has 24 divisors (see below), whose sum is σ = 21916440. Its totient is φ = 6589440.

The previous prime is 12499589. The next prime is 12499631. The reversal of 12499605 is 50699421.

12499605 is a `hidden beast` number, since 1 + 2 + 49 + 9 + 605 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 617796 + 11881809 = 786^2 + 3447^2 .

It is not a de Polignac number, because 12499605 - 2⁴ = 12499589 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 12499605.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2445 + ... + 5565.

It is an arithmetic number, because the mean of its divisors is an integer number (913185).

Almost surely, 2^12499605 is an apocalyptic number.

12499605 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

12499605 is a deficient number, since it is larger than the sum of its proper divisors (9416835).

12499605 is a wasteful number, since it uses less digits than its factorization.

12499605 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3221 (or 3218 counting only the distinct ones).

The product of its (nonzero) digits is 19440, while the sum is 36.

The square root of 12499605 is about 3535.4780440557. The cubic root of 12499605 is about 232.0769970848.

The spelling of 12499605 in words is "twelve million, four hundred ninety-nine thousand, six hundred five".