4411681 has 4 divisors (see below), whose sum is σ = 4416532. Its totient is φ = 4406832.

The previous prime is 4411679. The next prime is 4411697. The reversal of 4411681 is 1861144.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 147456 + 4264225 = 384^2 + 2065^2 .

It is a 3-Lehmer number, since φ(4411681) divides (4411681-1)³.

It is a cyclic number.

It is not a de Polignac number, because 4411681 - 2¹ = 4411679 is a prime.

It is a super-2 number, since 2×4411681² = 38925858491522, 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 (4411601) 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, 606 + ... + 3031.

It is an arithmetic number, because the mean of its divisors is an integer number (1104133).

Almost surely, 2^4411681 is an apocalyptic number.

4411681 is the 1213-rd octagonal number.

It is an amenable number.

4411681 is a deficient number, since it is larger than the sum of its proper divisors (4851).

4411681 is a wasteful number, since it uses less digits than its factorization.

4411681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4850.

The product of its digits is 768, while the sum is 25.

The square root of 4411681 is about 2100.4001999619. The cubic root of 4411681 is about 164.0091334394.

It can be divided in two parts, 441 and 1681, that multiplied together give a square (741321 = 861²).

The spelling of 4411681 in words is "four million, four hundred eleven thousand, six hundred eighty-one".