71256236 has 6 divisors (see below), whose sum is σ = 124698420. Its totient is φ = 35628116.

The previous prime is 71256233. The next prime is 71256257. The reversal of 71256236 is 63265217.

It is not an unprimeable number, because it can be changed into a prime (71256233) 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 as a sum of consecutive naturals, namely, 8907026 + ... + 8907033.

It is an arithmetic number, because the mean of its divisors is an integer number (20783070).

Almost surely, 2^71256236 is an apocalyptic number.

It is an amenable number.

71256236 is a deficient number, since it is larger than the sum of its proper divisors (53442184).

71256236 is a wasteful number, since it uses less digits than its factorization.

71256236 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17814063 (or 17814061 counting only the distinct ones).

The product of its digits is 15120, while the sum is 32.

The square root of 71256236 is about 8441.3408887451. The cubic root of 71256236 is about 414.5793114352.

The spelling of 71256236 in words is "seventy-one million, two hundred fifty-six thousand, two hundred thirty-six".