71725857 has 24 divisors (see below), whose sum is σ = 112372992. Its totient is φ = 40572000.

The previous prime is 71725853. The next prime is 71725859. The reversal of 71725857 is 75852717.

It is not a de Polignac number, because 71725857 - 2² = 71725853 is a prime.

It is not an unprimeable number, because it can be changed into a prime (71725853) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 12432 + ... + 17262.

It is an arithmetic number, because the mean of its divisors is an integer number (4682208).

Almost surely, 2^71725857 is an apocalyptic number.

It is an amenable number.

71725857 is a deficient number, since it is larger than the sum of its proper divisors (40647135).

71725857 is a wasteful number, since it uses less digits than its factorization.

71725857 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4949 (or 4942 counting only the distinct ones).

The product of its digits is 137200, while the sum is 42.

The square root of 71725857 is about 8469.1119369152. Note that the first 3 decimals coincide. The cubic root of 71725857 is about 415.4880926730.

The spelling of 71725857 in words is "seventy-one million, seven hundred twenty-five thousand, eight hundred fifty-seven".