4491905 has 8 divisors (see below), whose sum is σ = 5880384. Its totient is φ = 3266800.

The previous prime is 4491899. The next prime is 4491913. The reversal of 4491905 is 5091944.

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

It is not a de Polignac number, because 4491905 - 2⁶ = 4491841 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 40781 + ... + 40890.

It is an arithmetic number, because the mean of its divisors is an integer number (735048).

Almost surely, 2^4491905 is an apocalyptic number.

It is an amenable number.

4491905 is a deficient number, since it is larger than the sum of its proper divisors (1388479).

4491905 is a wasteful number, since it uses less digits than its factorization.

4491905 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 81687.

The product of its (nonzero) digits is 6480, while the sum is 32.

The square root of 4491905 is about 2119.4114749147. The cubic root of 4491905 is about 164.9973063533.

The spelling of 4491905 in words is "four million, four hundred ninety-one thousand, nine hundred five".