71212241 has 4 divisors (see below), whose sum is σ = 71241792. Its totient is φ = 71182692.

The previous prime is 71212237. The next prime is 71212277. The reversal of 71212241 is 14221217.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 71212241 - 2² = 71212237 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (71212291) 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, 10805 + ... + 16098.

It is an arithmetic number, because the mean of its divisors is an integer number (17810448).

Almost surely, 2^71212241 is an apocalyptic number.

It is an amenable number.

71212241 is a deficient number, since it is larger than the sum of its proper divisors (29551).

71212241 is a wasteful number, since it uses less digits than its factorization.

71212241 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29550.

The product of its digits is 224, while the sum is 20.

The square root of 71212241 is about 8438.7345615323. The cubic root of 71212241 is about 414.4939707319.

Adding to 71212241 its reverse (14221217), we get a palindrome (85433458).

The spelling of 71212241 in words is "seventy-one million, two hundred twelve thousand, two hundred forty-one".