71255123 has 4 divisors (see below), whose sum is σ = 71373120. Its totient is φ = 71137128.

The previous prime is 71255099. The next prime is 71255159. The reversal of 71255123 is 32155217.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 32155217 = 2953 ⋅10889.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-71255123 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 71255092 and 71255101.

It is not an unprimeable number, because it can be changed into a prime (71251123) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 58088 + ... + 59301.

It is an arithmetic number, because the mean of its divisors is an integer number (17843280).

Almost surely, 2^71255123 is an apocalyptic number.

71255123 is a deficient number, since it is larger than the sum of its proper divisors (117997).

71255123 is a wasteful number, since it uses less digits than its factorization.

71255123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 117996.

The product of its digits is 2100, while the sum is 26.

The square root of 71255123 is about 8441.2749629425. The cubic root of 71255123 is about 414.5771528911.

The spelling of 71255123 in words is "seventy-one million, two hundred fifty-five thousand, one hundred twenty-three".