13163261 has 2 divisors, whose sum is σ = 13163262. Its totient is φ = 13163260.

The previous prime is 13163237. The next prime is 13163279. The reversal of 13163261 is 16236131.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 6943225 + 6220036 = 2635^2 + 2494^2 .

It is an emirp because it is prime and its reverse (16236131) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 13163261 - 2⁶ = 13163197 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13163201) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6581630 + 6581631.

It is an arithmetic number, because the mean of its divisors is an integer number (6581631).

Almost surely, 2^13163261 is an apocalyptic number.

It is an amenable number.

13163261 is a deficient number, since it is larger than the sum of its proper divisors (1).

13163261 is an equidigital number, since it uses as much as digits as its factorization.

13163261 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 648, while the sum is 23.

The square root of 13163261 is about 3628.1208634774. The cubic root of 13163261 is about 236.1136876838.

Adding to 13163261 its reverse (16236131), we get a palindrome (29399392).

The spelling of 13163261 in words is "thirteen million, one hundred sixty-three thousand, two hundred sixty-one".