71486521 has 8 divisors (see below), whose sum is σ = 72999360. Its totient is φ = 69986928.

The previous prime is 71486509. The next prime is 71486549. The reversal of 71486521 is 12568417.

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-71486521 is a prime.

It is a super-2 number, since 2×71486521² = 10220645369366882, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (71486501) 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 7 ways as a sum of consecutive naturals, for example, 7995 + ... + 14383.

It is an arithmetic number, because the mean of its divisors is an integer number (9124920).

Almost surely, 2^71486521 is an apocalyptic number.

It is an amenable number.

71486521 is a deficient number, since it is larger than the sum of its proper divisors (1512839).

71486521 is a wasteful number, since it uses less digits than its factorization.

71486521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6623.

The product of its digits is 13440, while the sum is 34.

The square root of 71486521 is about 8454.9701950983. The cubic root of 71486521 is about 415.0254419008.

The spelling of 71486521 in words is "seventy-one million, four hundred eighty-six thousand, five hundred twenty-one".