122105145 has 8 divisors (see below), whose sum is σ = 195368256. Its totient is φ = 65122736.

The previous prime is 122105141. The next prime is 122105147. The reversal of 122105145 is 541501221.

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

It is a cyclic number.

It is not a de Polignac number, because 122105145 - 2² = 122105141 is a prime.

It is not an unprimeable number, because it can be changed into a prime (122105141) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4070157 + ... + 4070186.

It is an arithmetic number, because the mean of its divisors is an integer number (24421032).

Almost surely, 2^122105145 is an apocalyptic number.

122105145 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

122105145 is a deficient number, since it is larger than the sum of its proper divisors (73263111).

122105145 is an equidigital number, since it uses as much as digits as its factorization.

122105145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8140351.

The product of its (nonzero) digits is 400, while the sum is 21.

The square root of 122105145 is about 11050.1196826098. The cubic root of 122105145 is about 496.1100077384.

Adding to 122105145 its reverse (541501221), we get a palindrome (663606366).

The spelling of 122105145 in words is "one hundred twenty-two million, one hundred five thousand, one hundred forty-five".