12898649 has 8 divisors (see below), whose sum is σ = 13433160. Its totient is φ = 12370176.

The previous prime is 12898643. The next prime is 12898657. The reversal of 12898649 is 94689821.

It can be written as a sum of positive squares in 4 ways, for example, as 753424 + 12145225 = 868^2 + 3485^2 .

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 12898649 - 2²⁰ = 11850073 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12898643) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3137 + ... + 5969.

It is an arithmetic number, because the mean of its divisors is an integer number (1679145).

Almost surely, 2^12898649 is an apocalyptic number.

It is an amenable number.

12898649 is a deficient number, since it is larger than the sum of its proper divisors (534511).

12898649 is a wasteful number, since it uses less digits than its factorization.

12898649 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3019.

The product of its digits is 248832, while the sum is 47.

The square root of 12898649 is about 3591.4689195370. The cubic root of 12898649 is about 234.5208222971.

The spelling of 12898649 in words is "twelve million, eight hundred ninety-eight thousand, six hundred forty-nine".