12683945 has 4 divisors (see below), whose sum is σ = 15220740. Its totient is φ = 10147152.

The previous prime is 12683941. The next prime is 12683947. The reversal of 12683945 is 54938621.

It is a happy number.

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 3904576 + 8779369 = 1976^2 + 2963^2 .

It is a cyclic number.

It is not a de Polignac number, because 12683945 - 2² = 12683941 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 12683899 and 12683908.

It is not an unprimeable number, because it can be changed into a prime (12683941) 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, 1268390 + ... + 1268399.

It is an arithmetic number, because the mean of its divisors is an integer number (3805185).

Almost surely, 2^12683945 is an apocalyptic number.

It is an amenable number.

12683945 is a deficient number, since it is larger than the sum of its proper divisors (2536795).

12683945 is an equidigital number, since it uses as much as digits as its factorization.

12683945 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2536794.

The product of its digits is 51840, while the sum is 38.

The square root of 12683945 is about 3561.4526530617. The cubic root of 12683945 is about 233.2122989060.

The spelling of 12683945 in words is "twelve million, six hundred eighty-three thousand, nine hundred forty-five".