122543105 has 4 divisors (see below), whose sum is σ = 147051732. Its totient is φ = 98034480.

The previous prime is 122543081. The next prime is 122543119. The reversal of 122543105 is 501345221.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 501345221 = 13 ⋅38565017.

It can be written as a sum of positive squares in 2 ways, for example, as 71791729 + 50751376 = 8473^2 + 7124^2 .

It is not a de Polignac number, because 122543105 - 2²² = 118348801 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12254306 + ... + 12254315.

It is an arithmetic number, because the mean of its divisors is an integer number (36762933).

Almost surely, 2^122543105 is an apocalyptic number.

It is an amenable number.

122543105 is a deficient number, since it is larger than the sum of its proper divisors (24508627).

122543105 is an equidigital number, since it uses as much as digits as its factorization.

122543105 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24508626.

The product of its (nonzero) digits is 1200, while the sum is 23.

The square root of 122543105 is about 11069.9189247257. The cubic root of 122543105 is about 496.7024400060.

Adding to 122543105 its reverse (501345221), we get a palindrome (623888326).

The spelling of 122543105 in words is "one hundred twenty-two million, five hundred forty-three thousand, one hundred five".