71121105 has 64 divisors (see below), whose sum is σ = 141004800. Its totient is φ = 33716160.

The previous prime is 71121091. The next prime is 71121109. The reversal of 71121105 is 50112117.

It is a happy number.

It is not a de Polignac number, because 71121105 - 2⁹ = 71120593 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (71121109) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 69286 + ... + 70304.

It is an arithmetic number, because the mean of its divisors is an integer number (2203200).

Almost surely, 2^71121105 is an apocalyptic number.

It is an amenable number.

71121105 is a deficient number, since it is larger than the sum of its proper divisors (69883695).

71121105 is a wasteful number, since it uses less digits than its factorization.

71121105 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1091 (or 1085 counting only the distinct ones).

The product of its (nonzero) digits is 70, while the sum is 18.

The square root of 71121105 is about 8433.3329710145. The cubic root of 71121105 is about 414.3170748866.

The spelling of 71121105 in words is "seventy-one million, one hundred twenty-one thousand, one hundred five".