13142561 has 2 divisors, whose sum is σ = 13142562. Its totient is φ = 13142560.

The previous prime is 13142551. The next prime is 13142567. The reversal of 13142561 is 16524131.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 13140625 + 1936 = 3625^2 + 44^2 .

It is a cyclic number.

It is not a de Polignac number, because 13142561 - 2¹⁰ = 13141537 is a prime.

It is not a weakly prime, because it can be changed into another prime (13142567) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6571280 + 6571281.

It is an arithmetic number, because the mean of its divisors is an integer number (6571281).

Almost surely, 2^13142561 is an apocalyptic number.

It is an amenable number.

13142561 is a deficient number, since it is larger than the sum of its proper divisors (1).

13142561 is an equidigital number, since it uses as much as digits as its factorization.

13142561 is an evil number, because the sum of its binary digits is even.

The product of its digits is 720, while the sum is 23.

The square root of 13142561 is about 3625.2670246480. The cubic root of 13142561 is about 235.9898552088.

Adding to 13142561 its reverse (16524131), we get a palindrome (29666692).

The spelling of 13142561 in words is "thirteen million, one hundred forty-two thousand, five hundred sixty-one".