8237561 has 2 divisors, whose sum is σ = 8237562. Its totient is φ = 8237560.

The previous prime is 8237543. The next prime is 8237617. The reversal of 8237561 is 1657328.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 8231161 + 6400 = 2869^2 + 80^2 .

It is a cyclic number.

It is not a de Polignac number, because 8237561 - 2⁶ = 8237497 is a prime.

It is a super-2 number, since 2×8237561² = 135714822457442, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (8237261) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4118780 + 4118781.

It is an arithmetic number, because the mean of its divisors is an integer number (4118781).

Almost surely, 2^8237561 is an apocalyptic number.

It is an amenable number.

8237561 is a deficient number, since it is larger than the sum of its proper divisors (1).

8237561 is an equidigital number, since it uses as much as digits as its factorization.

8237561 is an evil number, because the sum of its binary digits is even.

The product of its digits is 10080, while the sum is 32.

The square root of 8237561 is about 2870.1151544842. The cubic root of 8237561 is about 201.9603964447.

The spelling of 8237561 in words is "eight million, two hundred thirty-seven thousand, five hundred sixty-one".