123145712 has 20 divisors (see below), whose sum is σ = 243098280. Its totient is φ = 60410688.

The previous prime is 123145699. The next prime is 123145727. The reversal of 123145712 is 217541321.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 71762 + ... + 73457.

It is an arithmetic number, because the mean of its divisors is an integer number (12154914).

Almost surely, 2^123145712 is an apocalyptic number.

It is an amenable number.

123145712 is a deficient number, since it is larger than the sum of its proper divisors (119952568).

123145712 is a wasteful number, since it uses less digits than its factorization.

123145712 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 145280 (or 145274 counting only the distinct ones).

The product of its digits is 1680, while the sum is 26.

The square root of 123145712 is about 11097.1037662987. The cubic root of 123145712 is about 497.5152888747.

The spelling of 123145712 in words is "one hundred twenty-three million, one hundred forty-five thousand, seven hundred twelve".