71321244 has 12 divisors (see below), whose sum is σ = 166416264. Its totient is φ = 23773744.

The previous prime is 71321233. The next prime is 71321249. The reversal of 71321244 is 44212317.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (12).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71321249) 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, 2971707 + ... + 2971730.

It is an arithmetic number, because the mean of its divisors is an integer number (13868022).

Almost surely, 2^71321244 is an apocalyptic number.

It is an amenable number.

71321244 is an abundant number, since it is smaller than the sum of its proper divisors (95095020).

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

71321244 is a wasteful number, since it uses less digits than its factorization.

71321244 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5943444 (or 5943442 counting only the distinct ones).

The product of its digits is 1344, while the sum is 24.

The square root of 71321244 is about 8445.1905839951. The cubic root of 71321244 is about 414.7053484982.

The spelling of 71321244 in words is "seventy-one million, three hundred twenty-one thousand, two hundred forty-four".