71120857 has 4 divisors (see below), whose sum is σ = 74864080. Its totient is φ = 67377636.

The previous prime is 71120837. The next prime is 71120887. The reversal of 71120857 is 75802117.

It is a happy number.

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 71120857 - 2¹¹ = 71118809 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (71120827) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1871583 + ... + 1871620.

It is an arithmetic number, because the mean of its divisors is an integer number (18716020).

Almost surely, 2^71120857 is an apocalyptic number.

It is an amenable number.

71120857 is a deficient number, since it is larger than the sum of its proper divisors (3743223).

71120857 is a wasteful number, since it uses less digits than its factorization.

71120857 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3743222.

The product of its (nonzero) digits is 3920, while the sum is 31.

The square root of 71120857 is about 8433.3182674437. The cubic root of 71120857 is about 414.3165933102.

The spelling of 71120857 in words is "seventy-one million, one hundred twenty thousand, eight hundred fifty-seven".