123112845 has 16 divisors (see below), whose sum is σ = 218867520. Its totient is φ = 65660112.

The previous prime is 123112819. The next prime is 123112853. The reversal of 123112845 is 548211321.

It is not a de Polignac number, because 123112845 - 2¹² = 123108749 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Curzon 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, 455839 + ... + 456108.

It is an arithmetic number, because the mean of its divisors is an integer number (13679220).

Almost surely, 2^123112845 is an apocalyptic number.

123112845 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

123112845 is a deficient number, since it is larger than the sum of its proper divisors (95754675).

123112845 is an equidigital number, since it uses as much as digits as its factorization.

123112845 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 911961 (or 911955 counting only the distinct ones).

The product of its digits is 1920, while the sum is 27.

The square root of 123112845 is about 11095.6227855853. The cubic root of 123112845 is about 497.4710234548.

The spelling of 123112845 in words is "one hundred twenty-three million, one hundred twelve thousand, eight hundred forty-five".