2121385 has 8 divisors (see below), whose sum is σ = 2909376. Its totient is φ = 1454640.

The previous prime is 2121377. The next prime is 2121389. The reversal of 2121385 is 5831212.

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

It is not a de Polignac number, because 2121385 - 2³ = 2121377 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2121389) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 30271 + ... + 30340.

It is an arithmetic number, because the mean of its divisors is an integer number (363672).

2^2121385 is an apocalyptic number.

It is an amenable number.

2121385 is a deficient number, since it is larger than the sum of its proper divisors (787991).

2121385 is an equidigital number, since it uses as much as digits as its factorization.

2121385 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 60623.

The product of its digits is 480, while the sum is 22.

The square root of 2121385 is about 1456.4975111548. The cubic root of 2121385 is about 128.4911347576.

Adding to 2121385 its reverse (5831212), we get a palindrome (7952597).

The spelling of 2121385 in words is "two million, one hundred twenty-one thousand, three hundred eighty-five".