123601243 has 4 divisors (see below), whose sum is σ = 123780808. Its totient is φ = 123421680.

The previous prime is 123601217. The next prime is 123601259. The reversal of 123601243 is 342106321.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 342106321 = 257 ⋅1331153.

It is a cyclic number.

It is not a de Polignac number, because 123601243 - 2⁹ = 123600731 is a prime.

It is a super-2 number, since 2×123601243² = 30554534542290098, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (123601043) 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, 88746 + ... + 90127.

It is an arithmetic number, because the mean of its divisors is an integer number (30945202).

Almost surely, 2^123601243 is an apocalyptic number.

123601243 is a deficient number, since it is larger than the sum of its proper divisors (179565).

123601243 is an equidigital number, since it uses as much as digits as its factorization.

123601243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 179564.

The product of its (nonzero) digits is 864, while the sum is 22.

The square root of 123601243 is about 11117.6095901952. The cubic root of 123601243 is about 498.1279905752.

Adding to 123601243 its reverse (342106321), we get a palindrome (465707564).

The spelling of 123601243 in words is "one hundred twenty-three million, six hundred one thousand, two hundred forty-three".