71101001 has 4 divisors (see below), whose sum is σ = 71139012. Its totient is φ = 71062992.

The previous prime is 71100979. The next prime is 71101039. The reversal of 71101001 is 10010117.

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 10883401 + 60217600 = 3299^2 + 7760^2 .

It is a cyclic number.

It is not a de Polignac number, because 71101001 - 2⁶ = 71100937 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (71101081) 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, 16046 + ... + 19991.

It is an arithmetic number, because the mean of its divisors is an integer number (17784753).

Almost surely, 2^71101001 is an apocalyptic number.

It is an amenable number.

71101001 is a deficient number, since it is larger than the sum of its proper divisors (38011).

71101001 is a wasteful number, since it uses less digits than its factorization.

71101001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38010.

The product of its (nonzero) digits is 7, while the sum is 11.

The square root of 71101001 is about 8432.1409499605. The cubic root of 71101001 is about 414.2780324888.

Adding to 71101001 its reverse (10010117), we get a palindrome (81111118).

The spelling of 71101001 in words is "seventy-one million, one hundred one thousand, one".