6140209 has 4 divisors (see below), whose sum is σ = 6256116. Its totient is φ = 6024304.

The previous prime is 6140207. The next prime is 6140219. The reversal of 6140209 is 9020416.

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 3240000 + 2900209 = 1800^2 + 1703^2 .

It is a cyclic number.

It is not a de Polignac number, because 6140209 - 2¹ = 6140207 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 6140209.

It is not an unprimeable number, because it can be changed into a prime (6140207) 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, 57874 + ... + 57979.

It is an arithmetic number, because the mean of its divisors is an integer number (1564029).

Almost surely, 2^6140209 is an apocalyptic number.

It is an amenable number.

6140209 is a deficient number, since it is larger than the sum of its proper divisors (115907).

6140209 is a wasteful number, since it uses less digits than its factorization.

6140209 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 115906.

The product of its (nonzero) digits is 432, while the sum is 22.

The square root of 6140209 is about 2477.9445110817. The cubic root of 6140209 is about 183.1166008177.

The spelling of 6140209 in words is "six million, one hundred forty thousand, two hundred nine".