123600561 has 8 divisors (see below), whose sum is σ = 188343744. Its totient is φ = 70628880.

The previous prime is 123600559. The next prime is 123600569. The reversal of 123600561 is 165006321.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 123600561 - 2¹ = 123600559 is a prime.

It is not an unprimeable number, because it can be changed into a prime (123600569) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2942850 + ... + 2942891.

It is an arithmetic number, because the mean of its divisors is an integer number (23542968).

Almost surely, 2^123600561 is an apocalyptic number.

It is an amenable number.

123600561 is a deficient number, since it is larger than the sum of its proper divisors (64743183).

123600561 is an equidigital number, since it uses as much as digits as its factorization.

123600561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5885751.

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

The square root of 123600561 is about 11117.5789180918. The cubic root of 123600561 is about 498.1270743926.

Adding to 123600561 its reverse (165006321), we get a palindrome (288606882).

The spelling of 123600561 in words is "one hundred twenty-three million, six hundred thousand, five hundred sixty-one".