12659649 has 8 divisors (see below), whose sum is σ = 16900032. Its totient is φ = 8429520.

The previous prime is 12659629. The next prime is 12659657. The reversal of 12659649 is 94695621.

It is a happy number.

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

It is not a de Polignac number, because 12659649 - 2⁵ = 12659617 is a prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 12659649.

It is not an unprimeable number, because it can be changed into a prime (12659609) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1047 + ... + 5139.

It is an arithmetic number, because the mean of its divisors is an integer number (2112504).

Almost surely, 2^12659649 is an apocalyptic number.

It is an amenable number.

12659649 is a deficient number, since it is larger than the sum of its proper divisors (4240383).

12659649 is a wasteful number, since it uses less digits than its factorization.

12659649 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5127.

The product of its digits is 116640, while the sum is 42.

The square root of 12659649 is about 3558.0400503648. The cubic root of 12659649 is about 233.0632982684.

The spelling of 12659649 in words is "twelve million, six hundred fifty-nine thousand, six hundred forty-nine".