71851841 has 8 divisors (see below), whose sum is σ = 72825480. Its totient is φ = 70884352.

The previous prime is 71851837. The next prime is 71851859. The reversal of 71851841 is 14815817.

It can be written as a sum of positive squares in 4 ways, for example, as 2961841 + 68890000 = 1721^2 + 8300^2 .

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 71851841 - 2² = 71851837 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (71851811) 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 7 ways as a sum of consecutive naturals, for example, 24965 + ... + 27693.

It is an arithmetic number, because the mean of its divisors is an integer number (9103185).

Almost surely, 2^71851841 is an apocalyptic number.

It is an amenable number.

71851841 is a deficient number, since it is larger than the sum of its proper divisors (973639).

71851841 is a wasteful number, since it uses less digits than its factorization.

71851841 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3075.

The product of its digits is 8960, while the sum is 35.

The square root of 71851841 is about 8476.5465255610. The cubic root of 71851841 is about 415.7312138969.

The spelling of 71851841 in words is "seventy-one million, eight hundred fifty-one thousand, eight hundred forty-one".