12698649 has 6 divisors (see below), whose sum is σ = 18342506. Its totient is φ = 8465760.

The previous prime is 12698617. The next prime is 12698657. The reversal of 12698649 is 94689621.

It is a happy number.

12698649 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 8225424 + 4473225 = 2868^2 + 2115^2 .

It is not a de Polignac number, because 12698649 - 2⁵ = 12698617 is a prime.

It is a super-2 number, since 2×12698649² = 322511372850402, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12698689) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 705472 + ... + 705489.

Almost surely, 2^12698649 is an apocalyptic number.

It is an amenable number.

12698649 is a deficient number, since it is larger than the sum of its proper divisors (5643857).

12698649 is a wasteful number, since it uses less digits than its factorization.

12698649 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1410967 (or 1410964 counting only the distinct ones).

The product of its digits is 186624, while the sum is 45.

The square root of 12698649 is about 3563.5163813290. The cubic root of 12698649 is about 233.3023820623.

The spelling of 12698649 in words is "twelve million, six hundred ninety-eight thousand, six hundred forty-nine".