4481981 has 16 divisors (see below), whose sum is σ = 5328000. Its totient is φ = 3767904.

The previous prime is 4481927. The next prime is 4481989. The reversal of 4481981 is 1891844.

It is a de Polignac number, because none of the positive numbers 2^k-4481981 is a prime.

It is a super-2 number, since 2×4481981² = 40176307368722, 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 (4481989) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 24950 + ... + 25128.

It is an arithmetic number, because the mean of its divisors is an integer number (333000).

Almost surely, 2^4481981 is an apocalyptic number.

It is an amenable number.

4481981 is a deficient number, since it is larger than the sum of its proper divisors (846019).

4481981 is an equidigital number, since it uses as much as digits as its factorization.

With its successor (4481982) it forms a Ruth-Aaron pair, since the sum of their prime factors is the same (273).

4481981 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 273 (or 259 counting only the distinct ones).

The product of its digits is 9216, while the sum is 35.

The square root of 4481981 is about 2117.0689643939. The cubic root of 4481981 is about 164.8757068230.

The spelling of 4481981 in words is "four million, four hundred eighty-one thousand, nine hundred eighty-one".