71104221 has 12 divisors (see below), whose sum is σ = 103275900. Its totient is φ = 47139840.

The previous prime is 71104193. The next prime is 71104237. The reversal of 71104221 is 12240117.

It can be written as a sum of positive squares in 2 ways, for example, as 13176900 + 57927321 = 3630^2 + 7611^2 .

It is not a de Polignac number, because 71104221 - 2¹⁴ = 71087837 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 71104194 and 71104203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71104021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 20196 + ... + 23453.

It is an arithmetic number, because the mean of its divisors is an integer number (8606325).

Almost surely, 2^71104221 is an apocalyptic number.

It is an amenable number.

71104221 is a deficient number, since it is larger than the sum of its proper divisors (32171679).

71104221 is a wasteful number, since it uses less digits than its factorization.

71104221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43836 (or 43833 counting only the distinct ones).

The product of its (nonzero) digits is 112, while the sum is 18.

The square root of 71104221 is about 8432.3318838860. The cubic root of 71104221 is about 414.2842862926.

Adding to 71104221 its reverse (12240117), we get a palindrome (83344338).

The spelling of 71104221 in words is "seventy-one million, one hundred four thousand, two hundred twenty-one".