4121409 has 4 divisors (see below), whose sum is σ = 5495216. Its totient is φ = 2747604.

The previous prime is 4121401. The next prime is 4121413. The reversal of 4121409 is 9041214.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 4121409 - 2³ = 4121401 is a prime.

It is a D-number.

It is a Duffinian number.

4121409 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (4121401) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 686899 + ... + 686904.

It is an arithmetic number, because the mean of its divisors is an integer number (1373804).

Almost surely, 2^4121409 is an apocalyptic number.

It is an amenable number.

4121409 is a deficient number, since it is larger than the sum of its proper divisors (1373807).

4121409 is a wasteful number, since it uses less digits than its factorization.

4121409 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1373806.

The product of its (nonzero) digits is 288, while the sum is 21.

The square root of 4121409 is about 2030.1253655871. The cubic root of 4121409 is about 160.3301645815.

The spelling of 4121409 in words is "four million, one hundred twenty-one thousand, four hundred nine".