12544813 has 4 divisors (see below), whose sum is σ = 12883900. Its totient is φ = 12205728.

The previous prime is 12544799. The next prime is 12544843. The reversal of 12544813 is 31844521.

12544813 is digitally balanced in base 3, 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, and also an emirpimes, since its reverse is a distinct semiprime: 31844521 = 47 ⋅677543.

It can be written as a sum of positive squares in 2 ways, for example, as 5774409 + 6770404 = 2403^2 + 2602^2 .

It is a cyclic number.

It is not a de Polignac number, because 12544813 - 2¹³ = 12536621 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12544843) 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, 169488 + ... + 169561.

It is an arithmetic number, because the mean of its divisors is an integer number (3220975).

Almost surely, 2^12544813 is an apocalyptic number.

It is an amenable number.

12544813 is a deficient number, since it is larger than the sum of its proper divisors (339087).

12544813 is an equidigital number, since it uses as much as digits as its factorization.

12544813 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 339086.

The product of its digits is 3840, while the sum is 28.

The square root of 12544813 is about 3541.8657512673. The cubic root of 12544813 is about 232.3564489437.

The spelling of 12544813 in words is "twelve million, five hundred forty-four thousand, eight hundred thirteen".