4247009 has 4 divisors (see below), whose sum is σ = 4573716. Its totient is φ = 3920304.

The previous prime is 4246993. The next prime is 4247011. The reversal of 4247009 is 9007424.

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 1507984 + 2739025 = 1228^2 + 1655^2 .

It is a cyclic number.

It is not a de Polignac number, because 4247009 - 2⁴ = 4246993 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (4247039) 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, 163334 + ... + 163359.

It is an arithmetic number, because the mean of its divisors is an integer number (1143429).

Almost surely, 2^4247009 is an apocalyptic number.

It is an amenable number.

4247009 is a deficient number, since it is larger than the sum of its proper divisors (326707).

4247009 is a wasteful number, since it uses less digits than its factorization.

4247009 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 326706.

The product of its (nonzero) digits is 2016, while the sum is 26.

The square root of 4247009 is about 2060.8272610775. The cubic root of 4247009 is about 161.9425824056.

It can be divided in two parts, 4 and 247009, that multiplied together give a square (988036 = 994²).

The spelling of 4247009 in words is "four million, two hundred forty-seven thousand, nine".