7186561 has 2 divisors, whose sum is σ = 7186562. Its totient is φ = 7186560.

The previous prime is 7186559. The next prime is 7186583. The reversal of 7186561 is 1656817.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 6890625 + 295936 = 2625^2 + 544^2 .

It is a cyclic number.

It is not a de Polignac number, because 7186561 - 2¹ = 7186559 is a prime.

Together with 7186559, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (7189561) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3593280 + 3593281.

It is an arithmetic number, because the mean of its divisors is an integer number (3593281).

Almost surely, 2^7186561 is an apocalyptic number.

It is an amenable number.

7186561 is a deficient number, since it is larger than the sum of its proper divisors (1).

7186561 is an equidigital number, since it uses as much as digits as its factorization.

7186561 is an evil number, because the sum of its binary digits is even.

The product of its digits is 10080, while the sum is 34.

The square root of 7186561 is about 2680.7761935678. The cubic root of 7186561 is about 192.9776612444.

The spelling of 7186561 in words is "seven million, one hundred eighty-six thousand, five hundred sixty-one".