4142009 has 4 divisors (see below), whose sum is σ = 4148004. Its totient is φ = 4136016.

The previous prime is 4141967. The next prime is 4142011. The reversal of 4142009 is 9002414.

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 1951609 + 2190400 = 1397^2 + 1480^2 .

It is a cyclic number.

It is not a de Polignac number, because 4142009 - 2¹⁶ = 4076473 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (4142029) 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, 1802 + ... + 3395.

It is an arithmetic number, because the mean of its divisors is an integer number (1037001).

Almost surely, 2^4142009 is an apocalyptic number.

It is an amenable number.

4142009 is a deficient number, since it is larger than the sum of its proper divisors (5995).

4142009 is an equidigital number, since it uses as much as digits as its factorization.

4142009 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5994.

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

The square root of 4142009 is about 2035.1926198766. The cubic root of 4142009 is about 160.5968463427.

The spelling of 4142009 in words is "four million, one hundred forty-two thousand, nine".