71205071 has 8 divisors (see below), whose sum is σ = 81463200. Its totient is φ = 60968448.

The previous prime is 71205049. The next prime is 71205077. The reversal of 71205071 is 17050217.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-71205071 is a prime.

It is a super-2 number, since 2×71205071² = 10140324272230082, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71205077) 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 7 ways as a sum of consecutive naturals, for example, 2495 + ... + 12191.

It is an arithmetic number, because the mean of its divisors is an integer number (10182900).

Almost surely, 2^71205071 is an apocalyptic number.

71205071 is a deficient number, since it is larger than the sum of its proper divisors (10258129).

71205071 is a wasteful number, since it uses less digits than its factorization.

71205071 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10753.

The product of its (nonzero) digits is 490, while the sum is 23.

The square root of 71205071 is about 8438.3097241094. The cubic root of 71205071 is about 414.4800591652.

Adding to 71205071 its reverse (17050217), we get a palindrome (88255288).

The spelling of 71205071 in words is "seventy-one million, two hundred five thousand, seventy-one".