4491729 has 24 divisors (see below), whose sum is σ = 7207200. Its totient is φ = 2672640.

The previous prime is 4491719. The next prime is 4491749. The reversal of 4491729 is 9271944.

It is not a de Polignac number, because 4491729 - 2⁹ = 4491217 is a prime.

It is an Ulam number.

It is a junction number, because it is equal to n+sod(n) for n = 4491693 and 4491702.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4491709) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 5457 + ... + 6225.

It is an arithmetic number, because the mean of its divisors is an integer number (300300).

Almost surely, 2^4491729 is an apocalyptic number.

It is an amenable number.

4491729 is a deficient number, since it is larger than the sum of its proper divisors (2715471).

4491729 is a wasteful number, since it uses less digits than its factorization.

4491729 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 845 (or 842 counting only the distinct ones).

The product of its digits is 18144, while the sum is 36.

The square root of 4491729 is about 2119.3699535475. The cubic root of 4491729 is about 164.9951513727.

The spelling of 4491729 in words is "four million, four hundred ninety-one thousand, seven hundred twenty-nine".