71046521 has 12 divisors (see below), whose sum is σ = 89004132. Its totient is φ = 56212128.

The previous prime is 71046511. The next prime is 71046523. The reversal of 71046521 is 12564017.

It can be written as a sum of positive squares in 2 ways, for example, as 5112121 + 65934400 = 2261^2 + 8120^2 .

It is a de Polignac number, because none of the positive numbers 2^k-71046521 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (71046523) 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 11 ways as a sum of consecutive naturals, for example, 55130 + ... + 56403.

It is an arithmetic number, because the mean of its divisors is an integer number (7417011).

Almost surely, 2^71046521 is an apocalyptic number.

It is an amenable number.

71046521 is a deficient number, since it is larger than the sum of its proper divisors (17957611).

71046521 is a wasteful number, since it uses less digits than its factorization.

71046521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 111560 (or 111553 counting only the distinct ones).

The product of its (nonzero) digits is 1680, while the sum is 26.

The square root of 71046521 is about 8428.9098346109. The cubic root of 71046521 is about 414.1721941558.

The spelling of 71046521 in words is "seventy-one million, forty-six thousand, five hundred twenty-one".