2001406 has 16 divisors (see below), whose sum is σ = 3389040. Its totient is φ = 878080.

The previous prime is 2001397. The next prime is 2001407. The reversal of 2001406 is 6041002.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2001407) 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, 931 + ... + 2206.

It is an arithmetic number, because the mean of its divisors is an integer number (211815).

2^2001406 is an apocalyptic number.

2001406 is a deficient number, since it is larger than the sum of its proper divisors (1387634).

2001406 is a wasteful number, since it uses less digits than its factorization.

2001406 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3179.

The product of its (nonzero) digits is 48, while the sum is 13.

The square root of 2001406 is about 1414.7105711063. The cubic root of 2001406 is about 126.0216222236.

Adding to 2001406 its reverse (6041002), we get a palindrome (8042408).

The spelling of 2001406 in words is "two million, one thousand, four hundred six".