4229681 has 4 divisors (see below), whose sum is σ = 4235364. Its totient is φ = 4224000.

The previous prime is 4229657. The next prime is 4229689. The reversal of 4229681 is 1869224.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1540081 + 2689600 = 1241^2 + 1640^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-4229681 is a prime.

It is a super-2 number, since 2×4229681² = 35780402723522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (4229689) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1520 + ... + 3281.

It is an arithmetic number, because the mean of its divisors is an integer number (1058841).

Almost surely, 2^4229681 is an apocalyptic number.

It is an amenable number.

4229681 is a deficient number, since it is larger than the sum of its proper divisors (5683).

4229681 is an equidigital number, since it uses as much as digits as its factorization.

4229681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5682.

The product of its digits is 6912, while the sum is 32.

The square root of 4229681 is about 2056.6188271043. The cubic root of 4229681 is about 161.7220376929.

The spelling of 4229681 in words is "four million, two hundred twenty-nine thousand, six hundred eighty-one".