8561011 has 2 divisors, whose sum is σ = 8561012. Its totient is φ = 8561010.

The previous prime is 8560961. The next prime is 8561017. The reversal of 8561011 is 1101658.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 8561011 - 2⁷ = 8560883 is a prime.

It is not a weakly prime, because it can be changed into another prime (8561017) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4280505 + 4280506.

It is an arithmetic number, because the mean of its divisors is an integer number (4280506).

Almost surely, 2^8561011 is an apocalyptic number.

8561011 is a deficient number, since it is larger than the sum of its proper divisors (1).

8561011 is an equidigital number, since it uses as much as digits as its factorization.

8561011 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 240, while the sum is 22.

The square root of 8561011 is about 2925.9205389074. The cubic root of 8561011 is about 204.5698774639.

Adding to 8561011 its reverse (1101658), we get a palindrome (9662669).

The spelling of 8561011 in words is "eight million, five hundred sixty-one thousand, eleven".