2128385 has 8 divisors (see below), whose sum is σ = 2918976. Its totient is φ = 1459440.

The previous prime is 2128381. The next prime is 2128387. The reversal of 2128385 is 5838212.

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

It is not a de Polignac number, because 2128385 - 2² = 2128381 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2128381) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 30371 + ... + 30440.

It is an arithmetic number, because the mean of its divisors is an integer number (364872).

2^2128385 is an apocalyptic number.

It is an amenable number.

2128385 is a deficient number, since it is larger than the sum of its proper divisors (790591).

2128385 is an equidigital number, since it uses as much as digits as its factorization.

2128385 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 60823.

The product of its digits is 3840, while the sum is 29.

The square root of 2128385 is about 1458.8985571314. The cubic root of 2128385 is about 128.6323083229.

The spelling of 2128385 in words is "two million, one hundred twenty-eight thousand, three hundred eighty-five".