71036641 has 8 divisors (see below), whose sum is σ = 78367464. Its totient is φ = 63972480.

The previous prime is 71036639. The next prime is 71036653. The reversal of 71036641 is 14663017.

It can be written as a sum of positive squares in 4 ways, for example, as 1147041 + 69889600 = 1071^2 + 8360^2 .

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

It is not a de Polignac number, because 71036641 - 2¹ = 71036639 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (71036621) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 66106 + ... + 67171.

It is an arithmetic number, because the mean of its divisors is an integer number (9795933).

Almost surely, 2^71036641 is an apocalyptic number.

It is an amenable number.

71036641 is a deficient number, since it is larger than the sum of its proper divisors (7330823).

71036641 is a wasteful number, since it uses less digits than its factorization.

71036641 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 133331.

The product of its (nonzero) digits is 3024, while the sum is 28.

The square root of 71036641 is about 8428.3237360699. The cubic root of 71036641 is about 414.1529944778.

Adding to 71036641 its reverse (14663017), we get a palindrome (85699658).

The spelling of 71036641 in words is "seventy-one million, thirty-six thousand, six hundred forty-one".