4481781 has 4 divisors (see below), whose sum is σ = 5975712. Its totient is φ = 2987852.

The previous prime is 4481767. The next prime is 4481791. The reversal of 4481781 is 1871844.

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 not a de Polignac number, because 4481781 - 2⁶ = 4481717 is a prime.

It is a super-2 number, since 2×4481781² = 40172721863922, which contains 22 as substring.

It is a D-number.

4481781 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4481791) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 746961 + ... + 746966.

It is an arithmetic number, because the mean of its divisors is an integer number (1493928).

Almost surely, 2^4481781 is an apocalyptic number.

It is an amenable number.

4481781 is a deficient number, since it is larger than the sum of its proper divisors (1493931).

4481781 is a wasteful number, since it uses less digits than its factorization.

4481781 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1493930.

The product of its digits is 7168, while the sum is 33.

The square root of 4481781 is about 2117.0217287501. The cubic root of 4481781 is about 164.8732543634.

The spelling of 4481781 in words is "four million, four hundred eighty-one thousand, seven hundred eighty-one".