71272871 has 4 divisors (see below), whose sum is σ = 71409672. Its totient is φ = 71136072.

The previous prime is 71272867. The next prime is 71272879. The reversal of 71272871 is 17827217.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 17827217 = 193 ⋅92369.

It is a cyclic number.

It is not a de Polignac number, because 71272871 - 2² = 71272867 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71272879) 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, 67616 + ... + 68661.

It is an arithmetic number, because the mean of its divisors is an integer number (17852418).

Almost surely, 2^71272871 is an apocalyptic number.

71272871 is a deficient number, since it is larger than the sum of its proper divisors (136801).

71272871 is a wasteful number, since it uses less digits than its factorization.

71272871 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 136800.

The product of its digits is 10976, while the sum is 35.

The square root of 71272871 is about 8442.3261604844. The cubic root of 71272871 is about 414.6115705544.

The spelling of 71272871 in words is "seventy-one million, two hundred seventy-two thousand, eight hundred seventy-one".