123040043 has 4 divisors (see below), whose sum is σ = 140617200. Its totient is φ = 105462888.

The previous prime is 123040039. The next prime is 123040081. The reversal of 123040043 is 340040321.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 123040043 - 2² = 123040039 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (123040003) 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, 8788568 + ... + 8788581.

It is an arithmetic number, because the mean of its divisors is an integer number (35154300).

Almost surely, 2^123040043 is an apocalyptic number.

123040043 is a deficient number, since it is larger than the sum of its proper divisors (17577157).

123040043 is an equidigital number, since it uses as much as digits as its factorization.

123040043 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17577156.

The product of its (nonzero) digits is 288, while the sum is 17.

The square root of 123040043 is about 11092.3416373640. The cubic root of 123040043 is about 497.3729453415.

Adding to 123040043 its reverse (340040321), we get a palindrome (463080364).

The spelling of 123040043 in words is "one hundred twenty-three million, forty thousand, forty-three".