71851272 has 32 divisors (see below), whose sum is σ = 182093280. Its totient is φ = 23621760.

The previous prime is 71851271. The next prime is 71851277. The reversal of 71851272 is 27215817.

It is not an unprimeable number, because it can be changed into a prime (71851271) 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, 18754 + ... + 22257.

It is an arithmetic number, because the mean of its divisors is an integer number (5690415).

Almost surely, 2^71851272 is an apocalyptic number.

It is an amenable number.

71851272 is an abundant number, since it is smaller than the sum of its proper divisors (110242008).

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

71851272 is a wasteful number, since it uses less digits than its factorization.

71851272 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41093 (or 41089 counting only the distinct ones).

The product of its digits is 7840, while the sum is 33.

The square root of 71851272 is about 8476.5129622976. The cubic root of 71851272 is about 415.7301164921.

The spelling of 71851272 in words is "seventy-one million, eight hundred fifty-one thousand, two hundred seventy-two".