71206457 has 20 divisors (see below), whose sum is σ = 84971136. Its totient is φ = 59640840.

The previous prime is 71206453. The next prime is 71206481. The reversal of 71206457 is 75460217.

It is not a de Polignac number, because 71206457 - 2² = 71206453 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (71206453) 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 in 19 ways as a sum of consecutive naturals, for example, 112532 + ... + 113162.

Almost surely, 2^71206457 is an apocalyptic number.

It is an amenable number.

71206457 is a deficient number, since it is larger than the sum of its proper divisors (13764679).

71206457 is an frugal number, since it uses more digits than its factorization.

71206457 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 706 (or 685 counting only the distinct ones).

The product of its (nonzero) digits is 11760, while the sum is 32.

The square root of 71206457 is about 8438.3918491618. The cubic root of 71206457 is about 414.4827484195.

The spelling of 71206457 in words is "seventy-one million, two hundred six thousand, four hundred fifty-seven".