71047641 has 32 divisors (see below), whose sum is σ = 116287488. Its totient is φ = 37658880.

The previous prime is 71047637. The next prime is 71047643. The reversal of 71047641 is 14674017.

It is not a de Polignac number, because 71047641 - 2² = 71047637 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 71047599 and 71047608.

It is not an unprimeable number, because it can be changed into a prime (71047643) 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 31 ways as a sum of consecutive naturals, for example, 23946 + ... + 26748.

It is an arithmetic number, because the mean of its divisors is an integer number (3633984).

Almost surely, 2^71047641 is an apocalyptic number.

71047641 is a gapful number since it is divisible by the number (71) formed by its first and last digit.

It is an amenable number.

71047641 is a deficient number, since it is larger than the sum of its proper divisors (45239847).

71047641 is a wasteful number, since it uses less digits than its factorization.

71047641 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2901.

The product of its (nonzero) digits is 4704, while the sum is 30.

The square root of 71047641 is about 8428.9762723595. The cubic root of 71047641 is about 414.1743705252.

The spelling of 71047641 in words is "seventy-one million, forty-seven thousand, six hundred forty-one".