71632121 has 12 divisors (see below), whose sum is σ = 79321200. Its totient is φ = 64636440.

The previous prime is 71632091. The next prime is 71632123. The reversal of 71632121 is 12123617.

It is not a de Polignac number, because 71632121 - 2¹⁴ = 71615737 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 (71632123) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 14690 + ... + 18948.

It is an arithmetic number, because the mean of its divisors is an integer number (6610100).

Almost surely, 2^71632121 is an apocalyptic number.

It is an amenable number.

71632121 is a deficient number, since it is larger than the sum of its proper divisors (7689079).

71632121 is a wasteful number, since it uses less digits than its factorization.

71632121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4420 (or 4409 counting only the distinct ones).

The product of its digits is 504, while the sum is 23.

The square root of 71632121 is about 8463.5761354170. The cubic root of 71632121 is about 415.3070181781.

Adding to 71632121 its reverse (12123617), we get a palindrome (83755738).

The spelling of 71632121 in words is "seventy-one million, six hundred thirty-two thousand, one hundred twenty-one".