71191121 has 8 divisors (see below), whose sum is σ = 75542400. Its totient is φ = 66858048.

The previous prime is 71191117. The next prime is 71191147. The reversal of 71191121 is 12119117.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 71191121 - 2² = 71191117 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 (71191171) 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, 3980 + ... + 12578.

It is an arithmetic number, because the mean of its divisors is an integer number (9442800).

Almost surely, 2^71191121 is an apocalyptic number.

It is an amenable number.

71191121 is a deficient number, since it is larger than the sum of its proper divisors (4351279).

71191121 is a wasteful number, since it uses less digits than its factorization.

71191121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9103.

The product of its digits is 126, while the sum is 23.

The square root of 71191121 is about 8437.4830962794. The cubic root of 71191121 is about 414.4529900516.

The spelling of 71191121 in words is "seventy-one million, one hundred ninety-one thousand, one hundred twenty-one".