71428585 has 4 divisors (see below), whose sum is σ = 85714308. Its totient is φ = 57142864.

The previous prime is 71428583. The next prime is 71428589. The reversal of 71428585 is 58582417.

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

It can be written as a sum of positive squares in 2 ways, for example, as 28643904 + 42784681 = 5352^2 + 6541^2 .

It is a cyclic number.

It is not a de Polignac number, because 71428585 - 2¹ = 71428583 is a prime.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (71428583) 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 3 ways as a sum of consecutive naturals, for example, 7142854 + ... + 7142863.

It is an arithmetic number, because the mean of its divisors is an integer number (21428577).

Almost surely, 2^71428585 is an apocalyptic number.

It is an amenable number.

71428585 is a deficient number, since it is larger than the sum of its proper divisors (14285723).

71428585 is a wasteful number, since it uses less digits than its factorization.

71428585 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14285722.

The product of its digits is 89600, while the sum is 40.

The square root of 71428585 is about 8451.5433501817. The cubic root of 71428585 is about 414.9132929610.

The spelling of 71428585 in words is "seventy-one million, four hundred twenty-eight thousand, five hundred eighty-five".