71289241 has 4 divisors (see below), whose sum is σ = 71390500. Its totient is φ = 71187984.

The previous prime is 71289233. The next prime is 71289247. The reversal of 71289241 is 14298217.

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 16232841 + 55056400 = 4029^2 + 7420^2 .

It is a cyclic number.

It is not a de Polignac number, because 71289241 - 2³ = 71289233 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 71289197 and 71289206.

It is not an unprimeable number, because it can be changed into a prime (71289247) 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, 49566 + ... + 50983.

It is an arithmetic number, because the mean of its divisors is an integer number (17847625).

Almost surely, 2^71289241 is an apocalyptic number.

It is an amenable number.

71289241 is a deficient number, since it is larger than the sum of its proper divisors (101259).

71289241 is a wasteful number, since it uses less digits than its factorization.

71289241 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 101258.

The product of its digits is 8064, while the sum is 34.

The square root of 71289241 is about 8443.2956243401. The cubic root of 71289241 is about 414.6433108774.

The spelling of 71289241 in words is "seventy-one million, two hundred eighty-nine thousand, two hundred forty-one".