12684961 has 2 divisors, whose sum is σ = 12684962. Its totient is φ = 12684960.

The previous prime is 12684943. The next prime is 12684979. The reversal of 12684961 is 16948621.

It is a happy number.

It is a balanced prime because it is at equal distance from previous prime (12684943) and next prime (12684979).

It can be written as a sum of positive squares in only one way, i.e., 7667361 + 5017600 = 2769^2 + 2240^2 .

It is a cyclic number.

It is not a de Polignac number, because 12684961 - 2⁵ = 12684929 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 12684961.

It is not a weakly prime, because it can be changed into another prime (12684911) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6342480 + 6342481.

It is an arithmetic number, because the mean of its divisors is an integer number (6342481).

Almost surely, 2^12684961 is an apocalyptic number.

It is an amenable number.

12684961 is a deficient number, since it is larger than the sum of its proper divisors (1).

12684961 is an equidigital number, since it uses as much as digits as its factorization.

12684961 is an evil number, because the sum of its binary digits is even.

The product of its digits is 20736, while the sum is 37.

The square root of 12684961 is about 3561.5952886312. The cubic root of 12684961 is about 233.2185256062.

The spelling of 12684961 in words is "twelve million, six hundred eighty-four thousand, nine hundred sixty-one".