871155447 has 32 divisors (see below), whose sum is σ = 1234970880. Its totient is φ = 545287680.

The previous prime is 871155443. The next prime is 871155449. The reversal of 871155447 is 744551178.

It is not a de Polignac number, because 871155447 - 2² = 871155443 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 871155399 and 871155408.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (871155443) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1260372 + ... + 1261062.

It is an arithmetic number, because the mean of its divisors is an integer number (38592840).

Almost surely, 2^871155447 is an apocalyptic number.

871155447 is a gapful number since it is divisible by the number (87) formed by its first and last digit.

871155447 is a deficient number, since it is larger than the sum of its proper divisors (363815433).

871155447 is a wasteful number, since it uses less digits than its factorization.

871155447 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1103.

The product of its digits is 156800, while the sum is 42.

The square root of 871155447 is about 29515.3425695857. The cubic root of 871155447 is about 955.0627032283.

The spelling of 871155447 in words is "eight hundred seventy-one million, one hundred fifty-five thousand, four hundred forty-seven".