7013561 has 2 divisors, whose sum is σ = 7013562. Its totient is φ = 7013560.

The previous prime is 7013557. The next prime is 7013581. The reversal of 7013561 is 1653107.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 3841600 + 3171961 = 1960^2 + 1781^2 .

It is an emirp because it is prime and its reverse (1653107) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 7013561 - 2² = 7013557 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (7013521) 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, 3506780 + 3506781.

It is an arithmetic number, because the mean of its divisors is an integer number (3506781).

Almost surely, 2^7013561 is an apocalyptic number.

It is an amenable number.

7013561 is a deficient number, since it is larger than the sum of its proper divisors (1).

7013561 is an equidigital number, since it uses as much as digits as its factorization.

7013561 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 630, while the sum is 23.

The square root of 7013561 is about 2648.3128591615. The cubic root of 7013561 is about 191.4165684006.

Adding to 7013561 its reverse (1653107), we get a palindrome (8666668).

It can be divided in two parts, 70 and 13561, that added together give a palindrome (13631).

The spelling of 7013561 in words is "seven million, thirteen thousand, five hundred sixty-one".