71214857 has 4 divisors (see below), whose sum is σ = 81388416. Its totient is φ = 61041300.

The previous prime is 71214851. The next prime is 71214859. The reversal of 71214857 is 75841217.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 71214857 - 2¹⁶ = 71149321 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (71214851) 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 3 ways as a sum of consecutive naturals, for example, 5086769 + ... + 5086782.

It is an arithmetic number, because the mean of its divisors is an integer number (20347104).

Almost surely, 2^71214857 is an apocalyptic number.

It is an amenable number.

71214857 is a deficient number, since it is larger than the sum of its proper divisors (10173559).

71214857 is a wasteful number, since it uses less digits than its factorization.

71214857 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10173558.

The product of its digits is 15680, while the sum is 35.

The square root of 71214857 is about 8438.8895596518. The cubic root of 71214857 is about 414.4990461839.

The spelling of 71214857 in words is "seventy-one million, two hundred fourteen thousand, eight hundred fifty-seven".