8561123 has 4 divisors (see below), whose sum is σ = 8649480. Its totient is φ = 8472768.

The previous prime is 8561117. The next prime is 8561131. The reversal of 8561123 is 3211658.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3211658 = 2 ⋅1605829.

It is a cyclic number.

It is not a de Polignac number, because 8561123 - 2⁴ = 8561107 is a prime.

It is a super-2 number, since 2×8561123² = 146585654042258, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 8561092 and 8561101.

It is not an unprimeable number, because it can be changed into a prime (8563123) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 44033 + ... + 44226.

It is an arithmetic number, because the mean of its divisors is an integer number (2162370).

Almost surely, 2^8561123 is an apocalyptic number.

8561123 is a deficient number, since it is larger than the sum of its proper divisors (88357).

8561123 is an equidigital number, since it uses as much as digits as its factorization.

8561123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 88356.

The product of its digits is 1440, while the sum is 26.

The square root of 8561123 is about 2925.9396781205. The cubic root of 8561123 is about 204.5707695597.

The spelling of 8561123 in words is "eight million, five hundred sixty-one thousand, one hundred twenty-three".