12345105 has 16 divisors (see below), whose sum is σ = 19865664. Its totient is φ = 6546240.

The previous prime is 12345083. The next prime is 12345121. The reversal of 12345105 is 50154321.

It is not a de Polignac number, because 12345105 - 2¹¹ = 12343057 is a prime.

It is a super-2 number, since 2×12345105² = 304803234922050, which contains 22 as substring.

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 15 ways as a sum of consecutive naturals, for example, 442 + ... + 4988.

It is an arithmetic number, because the mean of its divisors is an integer number (1241604).

Almost surely, 2^12345105 is an apocalyptic number.

12345105 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

12345105 is a deficient number, since it is larger than the sum of its proper divisors (7520559).

12345105 is a wasteful number, since it uses less digits than its factorization.

12345105 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4736.

The product of its (nonzero) digits is 600, while the sum is 21.

The square root of 12345105 is about 3513.5601602933. The cubic root of 12345105 is about 231.1168427466.

Adding to 12345105 its reverse (50154321), we get a palindrome (62499426).

The spelling of 12345105 in words is "twelve million, three hundred forty-five thousand, one hundred five".