2001385 has 4 divisors (see below), whose sum is σ = 2401668. Its totient is φ = 1601104.

The previous prime is 2001371. The next prime is 2001397. The reversal of 2001385 is 5831002.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 5831002 = 2 ⋅2915501.

It can be written as a sum of positive squares in 2 ways, for example, as 1478656 + 522729 = 1216^2 + 723^2 .

It is a cyclic number.

It is not a de Polignac number, because 2001385 - 2⁵ = 2001353 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 200134 + ... + 200143.

It is an arithmetic number, because the mean of its divisors is an integer number (600417).

2^2001385 is an apocalyptic number.

It is an amenable number.

2001385 is a deficient number, since it is larger than the sum of its proper divisors (400283).

2001385 is an equidigital number, since it uses as much as digits as its factorization.

2001385 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 400282.

The product of its (nonzero) digits is 240, while the sum is 19.

The square root of 2001385 is about 1414.7031490740. The cubic root of 2001385 is about 126.0211814563.

Adding to 2001385 its reverse (5831002), we get a palindrome (7832387).

The spelling of 2001385 in words is "two million, one thousand, three hundred eighty-five".