71137321 has 8 divisors (see below), whose sum is σ = 74314944. Its totient is φ = 67966800.

The previous prime is 71137307. The next prime is 71137327. The reversal of 71137321 is 12373117.

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 71137321 - 2⁹ = 71136809 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (71137327) 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 7 ways as a sum of consecutive naturals, for example, 36471 + ... + 38371.

It is an arithmetic number, because the mean of its divisors is an integer number (9289368).

Almost surely, 2^71137321 is an apocalyptic number.

It is an amenable number.

71137321 is a deficient number, since it is larger than the sum of its proper divisors (3177623).

71137321 is a wasteful number, since it uses less digits than its factorization.

71137321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3551.

The product of its digits is 882, while the sum is 25.

The square root of 71137321 is about 8434.2943391845. The cubic root of 71137321 is about 414.3485613450.

The spelling of 71137321 in words is "seventy-one million, one hundred thirty-seven thousand, three hundred twenty-one".