71065123 has 4 divisors (see below), whose sum is σ = 72985840. Its totient is φ = 69144408.

The previous prime is 71065069. The next prime is 71065133. The reversal of 71065123 is 32156017.

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

It is a cyclic number.

It is not a de Polignac number, because 71065123 - 2¹⁷ = 70934051 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (71065133) 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, 960303 + ... + 960376.

It is an arithmetic number, because the mean of its divisors is an integer number (18246460).

Almost surely, 2^71065123 is an apocalyptic number.

71065123 is a deficient number, since it is larger than the sum of its proper divisors (1920717).

71065123 is a wasteful number, since it uses less digits than its factorization.

71065123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1920716.

The product of its (nonzero) digits is 1260, while the sum is 25.

The square root of 71065123 is about 8430.0132265614. The cubic root of 71065123 is about 414.2083383551.

The spelling of 71065123 in words is "seventy-one million, sixty-five thousand, one hundred twenty-three".