4209491 has 8 divisors (see below), whose sum is σ = 4945584. Its totient is φ = 3532320.

The previous prime is 4209481. The next prime is 4209493. The reversal of 4209491 is 1949024.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 4209491 - 2²² = 15187 is a prime.

It is a d-powerful number, because it can be written as 4² + 2¹¹ + 0 + 9⁴ + 4¹¹ + 9⁴ + 1 .

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (4209493) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14576 + ... + 14861.

It is an arithmetic number, because the mean of its divisors is an integer number (618198).

Almost surely, 2^4209491 is an apocalyptic number.

4209491 is a deficient number, since it is larger than the sum of its proper divisors (736093).

4209491 is a wasteful number, since it uses less digits than its factorization.

4209491 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29461.

The product of its (nonzero) digits is 2592, while the sum is 29.

The square root of 4209491 is about 2051.7044134085. The cubic root of 4209491 is about 161.4643053256.

The spelling of 4209491 in words is "four million, two hundred nine thousand, four hundred ninety-one".