71256067 has 4 divisors (see below), whose sum is σ = 71274976. Its totient is φ = 71237160.

The previous prime is 71256019. The next prime is 71256071. The reversal of 71256067 is 76065217.

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 71256067 - 2¹¹ = 71254019 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (71256007) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1659 + ... + 12052.

It is an arithmetic number, because the mean of its divisors is an integer number (17818744).

Almost surely, 2^71256067 is an apocalyptic number.

71256067 is a deficient number, since it is larger than the sum of its proper divisors (18909).

71256067 is a wasteful number, since it uses less digits than its factorization.

71256067 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18908.

The product of its (nonzero) digits is 17640, while the sum is 34.

The square root of 71256067 is about 8441.3308784812. The cubic root of 71256067 is about 414.5789836792.

The spelling of 71256067 in words is "seventy-one million, two hundred fifty-six thousand, sixty-seven".