7297561 has 2 divisors, whose sum is σ = 7297562. Its totient is φ = 7297560.

The previous prime is 7297559. The next prime is 7297567. The reversal of 7297561 is 1657927.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 6031936 + 1265625 = 2456^2 + 1125^2 .

It is an emirp because it is prime and its reverse (1657927) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 7297561 - 2¹ = 7297559 is a prime.

Together with 7297559, it forms a pair of twin primes.

It is an Ulam number.

It is a self number, because there is not a number n which added to its sum of digits gives 7297561.

It is not a weakly prime, because it can be changed into another prime (7297567) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3648780 + 3648781.

It is an arithmetic number, because the mean of its divisors is an integer number (3648781).

Almost surely, 2^7297561 is an apocalyptic number.

It is an amenable number.

7297561 is a deficient number, since it is larger than the sum of its proper divisors (1).

7297561 is an equidigital number, since it uses as much as digits as its factorization.

7297561 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 26460, while the sum is 37.

The square root of 7297561 is about 2701.3998223143. The cubic root of 7297561 is about 193.9661346633.

The spelling of 7297561 in words is "seven million, two hundred ninety-seven thousand, five hundred sixty-one".