2128985 has 8 divisors (see below), whose sum is σ = 2566080. Its totient is φ = 1695664.

The previous prime is 2128963. The next prime is 2128991. The reversal of 2128985 is 5898212.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 2128985 - 2¹⁴ = 2112601 is a prime.

It is an Ulam number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 506 + ... + 2124.

It is an arithmetic number, because the mean of its divisors is an integer number (320760).

2^2128985 is an apocalyptic number.

It is an amenable number.

2128985 is a deficient number, since it is larger than the sum of its proper divisors (437095).

2128985 is a wasteful number, since it uses less digits than its factorization.

With its predecessor (2128984) it forms a Ruth-Aaron pair, since the sum of their distinct prime factors is the same (1887).

2128985 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1887.

The product of its digits is 11520, while the sum is 35.

The square root of 2128985 is about 1459.1041772266. The cubic root of 2128985 is about 128.6443945031.

It can be divided in two parts, 2128 and 985, that added together give a palindrome (3113).

The spelling of 2128985 in words is "two million, one hundred twenty-eight thousand, nine hundred eighty-five".