123112045 has 16 divisors (see below), whose sum is σ = 178771968. Its totient is φ = 79453440.

The previous prime is 123112019. The next prime is 123112051. The reversal of 123112045 is 540211321.

It is not a de Polignac number, because 123112045 - 2⁷ = 123111917 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 102861 + ... + 104050.

It is an arithmetic number, because the mean of its divisors is an integer number (11173248).

Almost surely, 2^123112045 is an apocalyptic number.

It is an amenable number.

123112045 is a deficient number, since it is larger than the sum of its proper divisors (55659923).

123112045 is a wasteful number, since it uses less digits than its factorization.

123112045 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 206940.

The product of its (nonzero) digits is 240, while the sum is 19.

The square root of 123112045 is about 11095.5867352745. The cubic root of 123112045 is about 497.4699459131.

Adding to 123112045 its reverse (540211321), we get a palindrome (663323366).

The spelling of 123112045 in words is "one hundred twenty-three million, one hundred twelve thousand, forty-five".