4120409 has 4 divisors (see below), whose sum is σ = 4362804. Its totient is φ = 3878016.

The previous prime is 4120393. The next prime is 4120411. The reversal of 4120409 is 9040214.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 3717184 + 403225 = 1928^2 + 635^2 .

It is a cyclic number.

It is not a de Polignac number, because 4120409 - 2⁴ = 4120393 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (4120429) 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, 121172 + ... + 121205.

It is an arithmetic number, because the mean of its divisors is an integer number (1090701).

Almost surely, 2^4120409 is an apocalyptic number.

It is an amenable number.

4120409 is a deficient number, since it is larger than the sum of its proper divisors (242395).

4120409 is a wasteful number, since it uses less digits than its factorization.

4120409 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 242394.

The product of its (nonzero) digits is 288, while the sum is 20.

The square root of 4120409 is about 2029.8790604369. The cubic root of 4120409 is about 160.3171962711.

It can be divided in two parts, 4 and 120409, that multiplied together give a square (481636 = 694²).

The spelling of 4120409 in words is "four million, one hundred twenty thousand, four hundred nine".