123105545 has 16 divisors (see below), whose sum is σ = 155381760. Its totient is φ = 93449664.

The previous prime is 123105539. The next prime is 123105559. The reversal of 123105545 is 545501321.

It is a cyclic number.

It is not a de Polignac number, because 123105545 - 2⁴ = 123105529 is a prime.

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, 10391 + ... + 18819.

It is an arithmetic number, because the mean of its divisors is an integer number (9711360).

Almost surely, 2^123105545 is an apocalyptic number.

It is an amenable number.

123105545 is a deficient number, since it is larger than the sum of its proper divisors (32276215).

123105545 is a wasteful number, since it uses less digits than its factorization.

123105545 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8584.

The product of its (nonzero) digits is 3000, while the sum is 26.

The square root of 123105545 is about 11095.2938221572. The cubic root of 123105545 is about 497.4611907135.

Adding to 123105545 its reverse (545501321), we get a palindrome (668606866).

The spelling of 123105545 in words is "one hundred twenty-three million, one hundred five thousand, five hundred forty-five".