71340121 has 4 divisors (see below), whose sum is σ = 71539200. Its totient is φ = 71141044.

The previous prime is 71340023. The next prime is 71340127. The reversal of 71340121 is 12104317.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-71340121 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (71340127) 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, 99001 + ... + 99718.

It is an arithmetic number, because the mean of its divisors is an integer number (17884800).

Almost surely, 2^71340121 is an apocalyptic number.

It is an amenable number.

71340121 is a deficient number, since it is larger than the sum of its proper divisors (199079).

71340121 is a wasteful number, since it uses less digits than its factorization.

71340121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 199078.

The product of its (nonzero) digits is 168, while the sum is 19.

The square root of 71340121 is about 8446.3081284073. The cubic root of 71340121 is about 414.7419327465.

Adding to 71340121 its reverse (12104317), we get a palindrome (83444438).

The spelling of 71340121 in words is "seventy-one million, three hundred forty thousand, one hundred twenty-one".