123112545 has 16 divisors (see below), whose sum is σ = 201785472. Its totient is φ = 64058240.

The previous prime is 123112519. The next prime is 123112559. The reversal of 123112545 is 545211321.

It is a happy number.

It is not a de Polignac number, because 123112545 - 2⁵ = 123112513 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, 99477 + ... + 100706.

It is an arithmetic number, because the mean of its divisors is an integer number (12611592).

Almost surely, 2^123112545 is an apocalyptic number.

123112545 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

123112545 is a deficient number, since it is larger than the sum of its proper divisors (78672927).

123112545 is a wasteful number, since it uses less digits than its factorization.

123112545 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 200232.

The product of its digits is 1200, while the sum is 24.

The square root of 123112545 is about 11095.6092667325. The cubic root of 123112545 is about 497.4706193772.

Adding to 123112545 its reverse (545211321), we get a palindrome (668323866).

The spelling of 123112545 in words is "one hundred twenty-three million, one hundred twelve thousand, five hundred forty-five".