71225847 has 48 divisors (see below), whose sum is σ = 129991680. Its totient is φ = 36504000.

The previous prime is 71225837. The next prime is 71225867. The reversal of 71225847 is 74852217.

71225847 is a `hidden beast` number, since 71 + 2 + 2 + 584 + 7 = 666.

It is not a de Polignac number, because 71225847 - 2⁴ = 71225831 is a prime.

It is a Smith number, since the sum of its digits (36) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71225837) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 54097 + ... + 55397.

It is an arithmetic number, because the mean of its divisors is an integer number (2708160).

Almost surely, 2^71225847 is an apocalyptic number.

71225847 is a gapful number since it is divisible by the number (77) formed by its first and last digit.

71225847 is a deficient number, since it is larger than the sum of its proper divisors (58765833).

71225847 is a wasteful number, since it uses less digits than its factorization.

71225847 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1404 (or 1401 counting only the distinct ones).

The product of its digits is 31360, while the sum is 36.

The square root of 71225847 is about 8439.5406865540. The cubic root of 71225847 is about 414.5203671573.

The spelling of 71225847 in words is "seventy-one million, two hundred twenty-five thousand, eight hundred forty-seven".