12513745 has 8 divisors (see below), whose sum is σ = 15154920. Its totient is φ = 9918720.

The previous prime is 12513727. The next prime is 12513749. The reversal of 12513745 is 54731521.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 3101121 + 9412624 = 1761^2 + 3068^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 12513745 - 2⁵ = 12513713 is a prime.

It is not an unprimeable number, because it can be changed into a prime (12513749) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10936 + ... + 12025.

It is an arithmetic number, because the mean of its divisors is an integer number (1894365).

Almost surely, 2^12513745 is an apocalyptic number.

It is an amenable number.

12513745 is a deficient number, since it is larger than the sum of its proper divisors (2641175).

12513745 is a wasteful number, since it uses less digits than its factorization.

12513745 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23075.

The product of its digits is 4200, while the sum is 28.

The square root of 12513745 is about 3537.4772084071. The cubic root of 12513745 is about 232.1644753719.

The spelling of 12513745 in words is "twelve million, five hundred thirteen thousand, seven hundred forty-five".