71005141 has 4 divisors (see below), whose sum is σ = 75181932. Its totient is φ = 66828352.

The previous prime is 71005133. The next prime is 71005189. The reversal of 71005141 is 14150017.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 14150017 = 7 ⋅2021431.

It can be written as a sum of positive squares in 2 ways, for example, as 20666116 + 50339025 = 4546^2 + 7095^2 .

It is a cyclic number.

It is not a de Polignac number, because 71005141 - 2³ = 71005133 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 (71005241) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2088370 + ... + 2088403.

It is an arithmetic number, because the mean of its divisors is an integer number (18795483).

Almost surely, 2^71005141 is an apocalyptic number.

It is an amenable number.

71005141 is a deficient number, since it is larger than the sum of its proper divisors (4176791).

71005141 is a wasteful number, since it uses less digits than its factorization.

71005141 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4176790.

The product of its (nonzero) digits is 140, while the sum is 19.

The square root of 71005141 is about 8426.4548298795. The cubic root of 71005141 is about 414.0917690410.

Adding to 71005141 its reverse (14150017), we get a palindrome (85155158).

The spelling of 71005141 in words is "seventy-one million, five thousand, one hundred forty-one".