71297712 has 40 divisors (see below), whose sum is σ = 204652080. Its totient is φ = 23765760.

The previous prime is 71297701. The next prime is 71297717. The reversal of 71297712 is 21779217.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is not an unprimeable number, because it can be changed into a prime (71297717) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 82089 + ... + 82952.

It is an arithmetic number, because the mean of its divisors is an integer number (5116302).

Almost surely, 2^71297712 is an apocalyptic number.

71297712 is a gapful number since it is divisible by the number (72) formed by its first and last digit.

It is an amenable number.

71297712 is an abundant number, since it is smaller than the sum of its proper divisors (133354368).

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

71297712 is a wasteful number, since it uses less digits than its factorization.

71297712 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 165058 (or 165046 counting only the distinct ones).

The product of its digits is 12348, while the sum is 36.

The square root of 71297712 is about 8443.7972500528. The cubic root of 71297712 is about 414.6597336659.

It can be divided in two parts, 7129 and 7712, that added together give a palindrome (14841).

The spelling of 71297712 in words is "seventy-one million, two hundred ninety-seven thousand, seven hundred twelve".