71249712 has 20 divisors (see below), whose sum is σ = 184061880. Its totient is φ = 23749888.

The previous prime is 71249683. The next prime is 71249713. The reversal of 71249712 is 21794217.

It is not an unprimeable number, because it can be changed into a prime (71249713) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 742137 + ... + 742232.

It is an arithmetic number, because the mean of its divisors is an integer number (9203094).

Almost surely, 2^71249712 is an apocalyptic number.

It is an amenable number.

71249712 is an abundant number, since it is smaller than the sum of its proper divisors (112812168).

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

71249712 is a wasteful number, since it uses less digits than its factorization.

71249712 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1484380 (or 1484374 counting only the distinct ones).

The product of its digits is 7056, while the sum is 33.

The square root of 71249712 is about 8440.9544484021. The cubic root of 71249712 is about 414.5666585170.

It can be divided in two parts, 7124 and 9712, that added together give a triangular number (16836 = T₁₈₃).

The spelling of 71249712 in words is "seventy-one million, two hundred forty-nine thousand, seven hundred twelve".