84561171 has 4 divisors (see below), whose sum is σ = 112748232. Its totient is φ = 56374112.

The previous prime is 84561167. The next prime is 84561181. The reversal of 84561171 is 17116548.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 84561171 - 2² = 84561167 is a prime.

It is not an unprimeable number, because it can be changed into a prime (84561121) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14093526 + ... + 14093531.

It is an arithmetic number, because the mean of its divisors is an integer number (28187058).

Almost surely, 2^84561171 is an apocalyptic number.

84561171 is a deficient number, since it is larger than the sum of its proper divisors (28187061).

84561171 is a wasteful number, since it uses less digits than its factorization.

84561171 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28187060.

The product of its digits is 6720, while the sum is 33.

The square root of 84561171 is about 9195.7148172396. The cubic root of 84561171 is about 438.9250117953.

The spelling of 84561171 in words is "eighty-four million, five hundred sixty-one thousand, one hundred seventy-one".