13420961 has 2 divisors, whose sum is σ = 13420962. Its totient is φ = 13420960.

The previous prime is 13420949. The next prime is 13420987. The reversal of 13420961 is 16902431.

It is an a-pointer prime, because the next prime (13420987) can be obtained adding 13420961 to its sum of digits (26).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 7075600 + 6345361 = 2660^2 + 2519^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-13420961 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 13420961.

It is not a weakly prime, because it can be changed into another prime (13426961) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6710480 + 6710481.

It is an arithmetic number, because the mean of its divisors is an integer number (6710481).

Almost surely, 2^13420961 is an apocalyptic number.

It is an amenable number.

13420961 is a deficient number, since it is larger than the sum of its proper divisors (1).

13420961 is an equidigital number, since it uses as much as digits as its factorization.

13420961 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1296, while the sum is 26.

The square root of 13420961 is about 3663.4629792042. The cubic root of 13420961 is about 237.6445568714.

The spelling of 13420961 in words is "thirteen million, four hundred twenty thousand, nine hundred sixty-one".