871212243 has 16 divisors (see below), whose sum is σ = 1341760896. Its totient is φ = 496947840.

The previous prime is 871212241. The next prime is 871212283. The reversal of 871212243 is 342212178.

It is not a de Polignac number, because 871212243 - 2¹ = 871212241 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 871212243.

It is not an unprimeable number, because it can be changed into a prime (871212241) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 775921 + ... + 777042.

It is an arithmetic number, because the mean of its divisors is an integer number (83860056).

Almost surely, 2^871212243 is an apocalyptic number.

871212243 is a deficient number, since it is larger than the sum of its proper divisors (470548653).

871212243 is a wasteful number, since it uses less digits than its factorization.

871212243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1552994.

The product of its digits is 5376, while the sum is 30.

The square root of 871212243 is about 29516.3046975735. The cubic root of 871212243 is about 955.0834582546.

The spelling of 871212243 in words is "eight hundred seventy-one million, two hundred twelve thousand, two hundred forty-three".