71456971 has 4 divisors (see below), whose sum is σ = 72150832. Its totient is φ = 70763112.

The previous prime is 71456951. The next prime is 71456989. The reversal of 71456971 is 17965417.

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 71456971 - 2¹⁵ = 71424203 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (71456911) 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, 346776 + ... + 346981.

It is an arithmetic number, because the mean of its divisors is an integer number (18037708).

Almost surely, 2^71456971 is an apocalyptic number.

71456971 is a deficient number, since it is larger than the sum of its proper divisors (693861).

71456971 is a wasteful number, since it uses less digits than its factorization.

71456971 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 693860.

The product of its digits is 52920, while the sum is 40.

The square root of 71456971 is about 8453.2225216186. Note that the first 3 decimals coincide. The cubic root of 71456971 is about 414.9682484054.

It can be divided in two parts, 71456 and 971, that added together give a palindrome (72427).

The spelling of 71456971 in words is "seventy-one million, four hundred fifty-six thousand, nine hundred seventy-one".