71122071 has 4 divisors (see below), whose sum is σ = 94829432. Its totient is φ = 47414712.

The previous prime is 71122027. The next prime is 71122147. The reversal of 71122071 is 17022117.

It is a happy number.

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

It is not a de Polignac number, because 71122071 - 2²² = 66927767 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 (71122001) 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, 11853676 + ... + 11853681.

It is an arithmetic number, because the mean of its divisors is an integer number (23707358).

Almost surely, 2^71122071 is an apocalyptic number.

71122071 is a deficient number, since it is larger than the sum of its proper divisors (23707361).

71122071 is a wasteful number, since it uses less digits than its factorization.

71122071 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23707360.

The product of its (nonzero) digits is 196, while the sum is 21.

The square root of 71122071 is about 8433.3902435497. The cubic root of 71122071 is about 414.3189506940.

Adding to 71122071 its reverse (17022117), we get a palindrome (88144188).

The spelling of 71122071 in words is "seventy-one million, one hundred twenty-two thousand, seventy-one".