71145312 has 48 divisors (see below), whose sum is σ = 213437952. Its totient is φ = 20327040.

The previous prime is 71145247. The next prime is 71145317. The reversal of 71145312 is 21354117.

It is a tau number, because it is divible by the number of its divisors (48).

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71145317) 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 7 ways as a sum of consecutive naturals, for example, 52264 + ... + 53607.

It is an arithmetic number, because the mean of its divisors is an integer number (4446624).

Almost surely, 2^71145312 is an apocalyptic number.

It is an amenable number.

71145312 is an abundant number, since it is smaller than the sum of its proper divisors (142292640).

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

71145312 is a wasteful number, since it uses less digits than its factorization.

71145312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 105891 (or 105883 counting only the distinct ones).

The product of its digits is 840, while the sum is 24.

The square root of 71145312 is about 8434.7680466033. The cubic root of 71145312 is about 414.3640756364.

Adding to 71145312 its reverse (21354117), we get a palindrome (92499429).

The spelling of 71145312 in words is "seventy-one million, one hundred forty-five thousand, three hundred twelve".