4148209 has 4 divisors (see below), whose sum is σ = 4467316. Its totient is φ = 3829104.

The previous prime is 4148161. The next prime is 4148219. The reversal of 4148209 is 9028414.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 9028414 = 2 ⋅4514207.

It can be written as a sum of positive squares in 2 ways, for example, as 2471184 + 1677025 = 1572^2 + 1295^2 .

It is a cyclic number.

It is not a de Polignac number, because 4148209 - 2⁹ = 4147697 is a prime.

It is a Duffinian number.

4148209 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4148219) 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, 159534 + ... + 159559.

It is an arithmetic number, because the mean of its divisors is an integer number (1116829).

Almost surely, 2^4148209 is an apocalyptic number.

It is an amenable number.

4148209 is a deficient number, since it is larger than the sum of its proper divisors (319107).

4148209 is a wasteful number, since it uses less digits than its factorization.

4148209 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 319106.

The product of its (nonzero) digits is 2304, while the sum is 28.

The square root of 4148209 is about 2036.7152476475. The cubic root of 4148209 is about 160.6769366284.

The spelling of 4148209 in words is "four million, one hundred forty-eight thousand, two hundred nine".