123861043 has 4 divisors (see below), whose sum is σ = 123886840. Its totient is φ = 123835248.

The previous prime is 123861029. The next prime is 123861077. The reversal of 123861043 is 340168321.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 340168321 = 23 ⋅14789927.

It is a cyclic number.

It is not a de Polignac number, because 123861043 - 2²⁵ = 90306611 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (123861083) 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, 3330 + ... + 16087.

It is an arithmetic number, because the mean of its divisors is an integer number (30971710).

Almost surely, 2^123861043 is an apocalyptic number.

123861043 is a deficient number, since it is larger than the sum of its proper divisors (25797).

123861043 is an equidigital number, since it uses as much as digits as its factorization.

123861043 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25796.

The product of its (nonzero) digits is 3456, while the sum is 28.

The square root of 123861043 is about 11129.2876232039. The cubic root of 123861043 is about 498.4767548274.

The spelling of 123861043 in words is "one hundred twenty-three million, eight hundred sixty-one thousand, forty-three".