12650749 has 4 divisors (see below), whose sum is σ = 12715164. Its totient is φ = 12586336.

The previous prime is 12650747. The next prime is 12650753. The reversal of 12650749 is 94705621.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 8820900 + 3829849 = 2970^2 + 1957^2 .

It is a cyclic number.

It is not a de Polignac number, because 12650749 - 2¹ = 12650747 is a prime.

It is a super-2 number, since 2×12650749² = 320082900522002, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12650747) 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 3 ways as a sum of consecutive naturals, for example, 31912 + ... + 32305.

It is an arithmetic number, because the mean of its divisors is an integer number (3178791).

Almost surely, 2^12650749 is an apocalyptic number.

It is an amenable number.

12650749 is a deficient number, since it is larger than the sum of its proper divisors (64415).

12650749 is an equidigital number, since it uses as much as digits as its factorization.

12650749 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 64414.

The product of its (nonzero) digits is 15120, while the sum is 34.

The square root of 12650749 is about 3556.7891419088. The cubic root of 12650749 is about 233.0086693281.

The spelling of 12650749 in words is "twelve million, six hundred fifty thousand, seven hundred forty-nine".