4135681 has 4 divisors (see below), whose sum is σ = 4511664. Its totient is φ = 3759700.

The previous prime is 4135627. The next prime is 4135717. The reversal of 4135681 is 1865314.

4135681 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 4135681 - 2⁹ = 4135169 is a prime.

It is a super-2 number, since 2×4135681² = 34207714667522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (4135381) 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, 187975 + ... + 187996.

It is an arithmetic number, because the mean of its divisors is an integer number (1127916).

Almost surely, 2^4135681 is an apocalyptic number.

It is an amenable number.

4135681 is a deficient number, since it is larger than the sum of its proper divisors (375983).

4135681 is a wasteful number, since it uses less digits than its factorization.

4135681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 375982.

The product of its digits is 2880, while the sum is 28.

The square root of 4135681 is about 2033.6373816391. The cubic root of 4135681 is about 160.5150201230.

The spelling of 4135681 in words is "four million, one hundred thirty-five thousand, six hundred eighty-one".