449981 has 4 divisors (see below), whose sum is σ = 514272. Its totient is φ = 385692.

The previous prime is 449971. The next prime is 449987. The reversal of 449981 is 189944.

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.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-449981 is a prime.

It is a super-2 number, since 2×449981² = 404965800722, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (449987) 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, 32135 + ... + 32148.

It is an arithmetic number, because the mean of its divisors is an integer number (128568).

2⁴⁴⁹⁹⁸¹ is an apocalyptic number.

It is an amenable number.

449981 is a deficient number, since it is larger than the sum of its proper divisors (64291).

449981 is an equidigital number, since it uses as much as digits as its factorization.

449981 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 64290.

The product of its digits is 10368, while the sum is 35.

The square root of 449981 is about 670.8062313366. The cubic root of 449981 is about 76.6298647146.

The spelling of 449981 in words is "four hundred forty-nine thousand, nine hundred eighty-one".