4235681 has 4 divisors (see below), whose sum is σ = 4246164. Its totient is φ = 4225200.

The previous prime is 4235663. The next prime is 4235683. The reversal of 4235681 is 1865324.

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 846400 + 3389281 = 920^2 + 1841^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-4235681 is a prime.

It is a super-2 number, since 2×4235681² = 35881987067522, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (4235683) 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, 4610 + ... + 5451.

It is an arithmetic number, because the mean of its divisors is an integer number (1061541).

Almost surely, 2^4235681 is an apocalyptic number.

It is an amenable number.

4235681 is a deficient number, since it is larger than the sum of its proper divisors (10483).

4235681 is a wasteful number, since it uses less digits than its factorization.

4235681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10482.

The product of its digits is 5760, while the sum is 29.

The square root of 4235681 is about 2058.0770150799. The cubic root of 4235681 is about 161.7984716499.

The spelling of 4235681 in words is "four million, two hundred thirty-five thousand, six hundred eighty-one".