2111409 has 12 divisors (see below), whose sum is σ = 3062800. Its totient is φ = 1401624.

The previous prime is 2111407. The next prime is 2111411. The reversal of 2111409 is 9041112.

It is an interprime number because it is at equal distance from previous prime (2111407) and next prime (2111411).

It is not a de Polignac number, because 2111409 - 2¹ = 2111407 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2111391 and 2111400.

It is not an unprimeable number, because it can be changed into a prime (2111407) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3102 + ... + 3720.

2^2111409 is an apocalyptic number.

It is an amenable number.

2111409 is a deficient number, since it is larger than the sum of its proper divisors (951391).

2111409 is a wasteful number, since it uses less digits than its factorization.

2111409 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1004 (or 1001 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 18.

The square root of 2111409 is about 1453.0688214947. The cubic root of 2111409 is about 128.2894045784.

The spelling of 2111409 in words is "two million, one hundred eleven thousand, four hundred nine".