71120123 has 4 divisors (see below), whose sum is σ = 71546160. Its totient is φ = 70694088.

The previous prime is 71120113. The next prime is 71120131. The reversal of 71120123 is 32102117.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-71120123 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (71120113) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 212768 + ... + 213101.

It is an arithmetic number, because the mean of its divisors is an integer number (17886540).

Almost surely, 2^71120123 is an apocalyptic number.

71120123 is a deficient number, since it is larger than the sum of its proper divisors (426037).

71120123 is a wasteful number, since it uses less digits than its factorization.

71120123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 426036.

The product of its (nonzero) digits is 84, while the sum is 17.

The square root of 71120123 is about 8433.2747494671. The cubic root of 71120123 is about 414.3151679926.

The spelling of 71120123 in words is "seventy-one million, one hundred twenty thousand, one hundred twenty-three".