71064281 has 4 divisors (see below), whose sum is σ = 71123892. Its totient is φ = 71004672.

The previous prime is 71064277. The next prime is 71064289. The reversal of 71064281 is 18246017.

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 20070400 + 50993881 = 4480^2 + 7141^2 .

It is a cyclic number.

It is not a de Polignac number, because 71064281 - 2² = 71064277 is a prime.

It is a super-2 number, since 2×71064281² = 10100264068093922, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (71064289) 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, 27980 + ... + 30413.

It is an arithmetic number, because the mean of its divisors is an integer number (17780973).

Almost surely, 2^71064281 is an apocalyptic number.

It is an amenable number.

71064281 is a deficient number, since it is larger than the sum of its proper divisors (59611).

71064281 is a wasteful number, since it uses less digits than its factorization.

71064281 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 59610.

The product of its (nonzero) digits is 2688, while the sum is 29.

The square root of 71064281 is about 8429.9632858038. The cubic root of 71064281 is about 414.2067024621.

The spelling of 71064281 in words is "seventy-one million, sixty-four thousand, two hundred eighty-one".