123500105 has 4 divisors (see below), whose sum is σ = 148200132. Its totient is φ = 98800080.

The previous prime is 123500093. The next prime is 123500107. The reversal of 123500105 is 501005321.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 501005321 = 829 ⋅604349.

It can be written as a sum of positive squares in 2 ways, for example, as 58003456 + 65496649 = 7616^2 + 8093^2 .

It is not a de Polignac number, because 123500105 - 2¹⁴ = 123483721 is a prime.

It is a super-2 number, since 2×123500105² = 30504551870022050, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (123500107) 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, 12350006 + ... + 12350015.

It is an arithmetic number, because the mean of its divisors is an integer number (37050033).

Almost surely, 2^123500105 is an apocalyptic number.

It is an amenable number.

123500105 is a deficient number, since it is larger than the sum of its proper divisors (24700027).

123500105 is an equidigital number, since it uses as much as digits as its factorization.

123500105 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24700026.

The product of its (nonzero) digits is 150, while the sum is 17.

The square root of 123500105 is about 11113.0601096188. The cubic root of 123500105 is about 497.9920873675.

Adding to 123500105 its reverse (501005321), we get a palindrome (624505426).

The spelling of 123500105 in words is "one hundred twenty-three million, five hundred thousand, one hundred five".