71281152 has 120 divisors (see below), whose sum is σ = 212784000. Its totient is φ = 22947840.

The previous prime is 71281151. The next prime is 71281157. The reversal of 71281152 is 25118217.

It is not an unprimeable number, because it can be changed into a prime (71281151) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 142599 + ... + 143097.

It is an arithmetic number, because the mean of its divisors is an integer number (1773200).

Almost surely, 2^71281152 is an apocalyptic number.

71281152 is a gapful number since it is divisible by the number (72) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 71281152, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (106392000).

71281152 is an abundant number, since it is smaller than the sum of its proper divisors (141502848).

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

71281152 is a wasteful number, since it uses less digits than its factorization.

71281152 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 554 (or 535 counting only the distinct ones).

The product of its digits is 1120, while the sum is 27.

The square root of 71281152 is about 8442.8165916358. The cubic root of 71281152 is about 414.6276274608.

Adding to 71281152 its reverse (25118217), we get a palindrome (96399369).

The spelling of 71281152 in words is "seventy-one million, two hundred eighty-one thousand, one hundred fifty-two".