71123120 has 20 divisors (see below), whose sum is σ = 165361440. Its totient is φ = 28449216.

The previous prime is 71123119. The next prime is 71123123. The reversal of 71123120 is 2132117.

It is a tau number, because it is divible by the number of its divisors (20).

It is not an unprimeable number, because it can be changed into a prime (71123123) 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, 444440 + ... + 444599.

It is an arithmetic number, because the mean of its divisors is an integer number (8268072).

Almost surely, 2^71123120 is an apocalyptic number.

It is an amenable number.

71123120 is an abundant number, since it is smaller than the sum of its proper divisors (94238320).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

71123120 is a wasteful number, since it uses less digits than its factorization.

71123120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 889052 (or 889046 counting only the distinct ones).

The product of its (nonzero) digits is 84, while the sum is 17.

The square root of 71123120 is about 8433.4524365766. The cubic root of 71123120 is about 414.3209876540.

Adding to 71123120 its reverse (2132117), we get a palindrome (73255237).

The spelling of 71123120 in words is "seventy-one million, one hundred twenty-three thousand, one hundred twenty".