5661123 has 16 divisors (see below), whose sum is σ = 8171520. Its totient is φ = 3465504.

The previous prime is 5661121. The next prime is 5661143. The reversal of 5661123 is 3211665.

It is not a de Polignac number, because 5661123 - 2¹ = 5661121 is a prime.

It is a super-2 number, since 2×5661123² = 64096627242258, which contains 22 as substring.

5661123 is a lucky number.

It is a junction number, because it is equal to n+sod(n) for n = 5661093 and 5661102.

It is not an unprimeable number, because it can be changed into a prime (5661121) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 14590 + ... + 14972.

It is an arithmetic number, because the mean of its divisors is an integer number (510720).

Almost surely, 2^5661123 is an apocalyptic number.

5661123 is a deficient number, since it is larger than the sum of its proper divisors (2510397).

5661123 is a wasteful number, since it uses less digits than its factorization.

5661123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 778.

The product of its digits is 1080, while the sum is 24.

The square root of 5661123 is about 2379.3114550222. The cubic root of 5661123 is about 178.2245514309.

Adding to 5661123 its reverse (3211665), we get a palindrome (8872788).

The spelling of 5661123 in words is "five million, six hundred sixty-one thousand, one hundred twenty-three".