84887121 has 16 divisors (see below), whose sum is σ = 124194240. Its totient is φ = 51145920.

The previous prime is 84887119. The next prime is 84887149. The reversal of 84887121 is 12178848.

It is a happy number.

It is not a de Polignac number, because 84887121 - 2¹ = 84887119 is a prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 84887121.

It is not an unprimeable number, because it can be changed into a prime (84887921) 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, 1726 + ... + 13143.

It is an arithmetic number, because the mean of its divisors is an integer number (7762140).

Almost surely, 2^84887121 is an apocalyptic number.

It is an amenable number.

84887121 is a deficient number, since it is larger than the sum of its proper divisors (39307119).

84887121 is a wasteful number, since it uses less digits than its factorization.

84887121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15056.

The product of its digits is 28672, while the sum is 39.

The square root of 84887121 is about 9213.4207002611. The cubic root of 84887121 is about 439.4882497269.

The spelling of 84887121 in words is "eighty-four million, eight hundred eighty-seven thousand, one hundred twenty-one".