71142041 has 4 divisors (see below), whose sum is σ = 71274084. Its totient is φ = 71010000.

The previous prime is 71142037. The next prime is 71142073. The reversal of 71142041 is 14024117.

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 45091225 + 26050816 = 6715^2 + 5104^2 .

It is a cyclic number.

It is not a de Polignac number, because 71142041 - 2² = 71142037 is a prime.

It is a super-2 number, since 2×71142041² = 10122379995291362, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (71142641) 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, 65210 + ... + 66291.

It is an arithmetic number, because the mean of its divisors is an integer number (17818521).

Almost surely, 2^71142041 is an apocalyptic number.

It is an amenable number.

71142041 is a deficient number, since it is larger than the sum of its proper divisors (132043).

71142041 is a wasteful number, since it uses less digits than its factorization.

71142041 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 132042.

The product of its (nonzero) digits is 224, while the sum is 20.

The square root of 71142041 is about 8434.5741445553. The cubic root of 71142041 is about 414.3577252266.

Adding to 71142041 its reverse (14024117), we get a palindrome (85166158).

The spelling of 71142041 in words is "seventy-one million, one hundred forty-two thousand, forty-one".