4291009 has 4 divisors (see below), whose sum is σ = 4296240. Its totient is φ = 4285780.

The previous prime is 4290997. The next prime is 4291031. The reversal of 4291009 is 9001924.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 4291009 - 2¹⁷ = 4159937 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (4291109) 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, 1087 + ... + 3124.

It is an arithmetic number, because the mean of its divisors is an integer number (1074060).

Almost surely, 2^4291009 is an apocalyptic number.

It is an amenable number.

4291009 is a deficient number, since it is larger than the sum of its proper divisors (5231).

4291009 is a wasteful number, since it uses less digits than its factorization.

4291009 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5230.

The product of its (nonzero) digits is 648, while the sum is 25.

The square root of 4291009 is about 2071.4750782957. The cubic root of 4291009 is about 162.4999163708.

Subtracting 4291009 from its reverse (9001924), we obtain a triangular number (4710915 = T₃₀₆₉).

The spelling of 4291009 in words is "four million, two hundred ninety-one thousand, nine".