13120643 has 2 divisors, whose sum is σ = 13120644. Its totient is φ = 13120642.

The previous prime is 13120631. The next prime is 13120663. The reversal of 13120643 is 34602131.

It is an a-pointer prime, because the next prime (13120663) can be obtained adding 13120643 to its sum of digits (20).

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 13120643 - 2²² = 8926339 is a prime.

It is not a weakly prime, because it can be changed into another prime (13120663) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6560321 + 6560322.

It is an arithmetic number, because the mean of its divisors is an integer number (6560322).

Almost surely, 2^13120643 is an apocalyptic number.

13120643 is a deficient number, since it is larger than the sum of its proper divisors (1).

13120643 is an equidigital number, since it uses as much as digits as its factorization.

13120643 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 432, while the sum is 20.

The square root of 13120643 is about 3622.2428135066. The cubic root of 13120643 is about 235.8585945491.

Adding to 13120643 its reverse (34602131), we get a palindrome (47722774).

The spelling of 13120643 in words is "thirteen million, one hundred twenty thousand, six hundred forty-three".