12684946 has 4 divisors (see below), whose sum is σ = 19027422. Its totient is φ = 6342472.

The previous prime is 12684943. The next prime is 12684961. The reversal of 12684946 is 64948621.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 64948621 = 131 ⋅495791.

It can be written as a sum of positive squares in only one way, i.e., 12680721 + 4225 = 3561^2 + 65^2 .

It is a junction number, because it is equal to n+sod(n) for n = 12684899 and 12684908.

It is not an unprimeable number, because it can be changed into a prime (12684943) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3171235 + ... + 3171238.

Almost surely, 2^12684946 is an apocalyptic number.

12684946 is a deficient number, since it is larger than the sum of its proper divisors (6342476).

12684946 is an equidigital number, since it uses as much as digits as its factorization.

12684946 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6342475.

The product of its digits is 82944, while the sum is 40.

The square root of 12684946 is about 3561.5931828326. The cubic root of 12684946 is about 233.2184336790.

The spelling of 12684946 in words is "twelve million, six hundred eighty-four thousand, nine hundred forty-six".