71241821 has 8 divisors (see below), whose sum is σ = 81875520. Its totient is φ = 60722208.

The previous prime is 71241803. The next prime is 71241869. The reversal of 71241821 is 12814217.

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 71241821 - 2¹⁰ = 71240797 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71241871) 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, 27176 + ... + 29681.

It is an arithmetic number, because the mean of its divisors is an integer number (10234440).

Almost surely, 2^71241821 is an apocalyptic number.

It is an amenable number.

71241821 is a deficient number, since it is larger than the sum of its proper divisors (10633699).

71241821 is a wasteful number, since it uses less digits than its factorization.

71241821 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 57043.

The product of its digits is 896, while the sum is 26.

The square root of 71241821 is about 8440.4870120154. The cubic root of 71241821 is about 414.5513533497.

The spelling of 71241821 in words is "seventy-one million, two hundred forty-one thousand, eight hundred twenty-one".