71142312 has 48 divisors (see below), whose sum is σ = 186107040. Its totient is φ = 22619872.

The previous prime is 71142311. The next prime is 71142347. The reversal of 71142312 is 21324117.

It is a super-2 number, since 2×71142312² = 10122457113410688, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71142311) 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 11 ways as a sum of consecutive naturals, for example, 197989 + ... + 198347.

It is an arithmetic number, because the mean of its divisors is an integer number (3877230).

Almost surely, 2^71142312 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 71142312, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (93053520).

71142312 is an abundant number, since it is smaller than the sum of its proper divisors (114964728).

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

71142312 is a wasteful number, since it uses less digits than its factorization.

71142312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 750 (or 387 counting only the distinct ones).

The product of its digits is 336, while the sum is 21.

The square root of 71142312 is about 8434.5902093700. The cubic root of 71142312 is about 414.3582513608.

Adding to 71142312 its reverse (21324117), we get a palindrome (92466429).

The spelling of 71142312 in words is "seventy-one million, one hundred forty-two thousand, three hundred twelve".