4021409 has 8 divisors (see below), whose sum is σ = 4630080. Its totient is φ = 3421296.

The previous prime is 4021399. The next prime is 4021411. The reversal of 4021409 is 9041204.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 4021409 - 2⁸ = 4021153 is a prime.

It is a nialpdrome in base 13.

It is not an unprimeable number, because it can be changed into a prime (4021439) 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, 1094 + ... + 3039.

It is an arithmetic number, because the mean of its divisors is an integer number (578760).

Almost surely, 2^4021409 is an apocalyptic number.

It is an amenable number.

4021409 is a deficient number, since it is larger than the sum of its proper divisors (608671).

4021409 is a wasteful number, since it uses less digits than its factorization.

4021409 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4279.

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

The square root of 4021409 is about 2005.3451074566. The cubic root of 4021409 is about 159.0228070075.

The spelling of 4021409 in words is "four million, twenty-one thousand, four hundred nine".