71231874 has 64 divisors (see below), whose sum is σ = 178882560. Its totient is φ = 18437760.

The previous prime is 71231873. The next prime is 71231879. The reversal of 71231874 is 47813217.

It is a happy number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (71231873) 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 31 ways as a sum of consecutive naturals, for example, 16414 + ... + 20294.

It is an arithmetic number, because the mean of its divisors is an integer number (2795040).

Almost surely, 2^71231874 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 71231874, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (89441280).

71231874 is an abundant number, since it is smaller than the sum of its proper divisors (107650686).

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

71231874 is a wasteful number, since it uses less digits than its factorization.

71231874 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3935.

The product of its digits is 9408, while the sum is 33.

The square root of 71231874 is about 8439.8977481958. The cubic root of 71231874 is about 414.5320588109.

The spelling of 71231874 in words is "seventy-one million, two hundred thirty-one thousand, eight hundred seventy-four".