71147941 has 4 divisors (see below), whose sum is σ = 75333132. Its totient is φ = 66962752.

The previous prime is 71147939. The next prime is 71147957. The reversal of 71147941 is 14974117.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 22287841 + 48860100 = 4721^2 + 6990^2 .

It is a cyclic number.

It is not a de Polignac number, because 71147941 - 2¹ = 71147939 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 71147897 and 71147906.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71147911) 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 3 ways as a sum of consecutive naturals, for example, 2092570 + ... + 2092603.

It is an arithmetic number, because the mean of its divisors is an integer number (18833283).

Almost surely, 2^71147941 is an apocalyptic number.

It is an amenable number.

71147941 is a deficient number, since it is larger than the sum of its proper divisors (4185191).

71147941 is a wasteful number, since it uses less digits than its factorization.

71147941 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4185190.

The product of its digits is 7056, while the sum is 34.

The square root of 71147941 is about 8434.9238882162. The cubic root of 71147941 is about 414.3691795086.

The spelling of 71147941 in words is "seventy-one million, one hundred forty-seven thousand, nine hundred forty-one".