13012649 has 4 divisors (see below), whose sum is σ = 14013636. Its totient is φ = 12011664.

The previous prime is 13012609. The next prime is 13012669. The reversal of 13012649 is 94621031.

13012649 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 937024 + 12075625 = 968^2 + 3475^2 .

It is a cyclic number.

It is not a de Polignac number, because 13012649 - 2⁸ = 13012393 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (13012609) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 500474 + ... + 500499.

It is an arithmetic number, because the mean of its divisors is an integer number (3503409).

Almost surely, 2^13012649 is an apocalyptic number.

It is an amenable number.

13012649 is a deficient number, since it is larger than the sum of its proper divisors (1000987).

13012649 is a wasteful number, since it uses less digits than its factorization.

13012649 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1000986.

The product of its (nonzero) digits is 1296, while the sum is 26.

The square root of 13012649 is about 3607.3049496820. The cubic root of 13012649 is about 235.2097056730.

The spelling of 13012649 in words is "thirteen million, twelve thousand, six hundred forty-nine".