449661 has 8 divisors (see below), whose sum is σ = 615904. Its totient is φ = 291600.

The previous prime is 449653. The next prime is 449663. The reversal of 449661 is 166944.

Added to its reverse (166944) it gives a triangular number (616605 = T₁₁₁₀).

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

It is not a de Polignac number, because 449661 - 2³ = 449653 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (449663) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1915 + ... + 2136.

It is an arithmetic number, because the mean of its divisors is an integer number (76988).

2⁴⁴⁹⁶⁶¹ is an apocalyptic number.

It is an amenable number.

449661 is a deficient number, since it is larger than the sum of its proper divisors (166243).

449661 is a wasteful number, since it uses less digits than its factorization.

449661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4091.

The product of its digits is 5184, while the sum is 30.

The square root of 449661 is about 670.5676699633. The cubic root of 449661 is about 76.6116955239.

Adding to 449661 its reverse (166944), we get a triangular number (616605 = T₁₁₁₀).

The spelling of 449661 in words is "four hundred forty-nine thousand, six hundred sixty-one".