4231681 has 4 divisors (see below), whose sum is σ = 4239664. Its totient is φ = 4223700.

The previous prime is 4231663. The next prime is 4231687. The reversal of 4231681 is 1861324.

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 4231681 - 2⁷ = 4231553 is a prime.

It is a super-2 number, since 2×4231681² = 35814248171522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (4231687) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (5) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3135 + ... + 4276.

It is an arithmetic number, because the mean of its divisors is an integer number (1059916).

Almost surely, 2^4231681 is an apocalyptic number.

It is an amenable number.

4231681 is a deficient number, since it is larger than the sum of its proper divisors (7983).

4231681 is an equidigital number, since it uses as much as digits as its factorization.

4231681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7982.

The product of its digits is 1152, while the sum is 25.

The square root of 4231681 is about 2057.1050046121. The cubic root of 4231681 is about 161.7475237054.

The spelling of 4231681 in words is "four million, two hundred thirty-one thousand, six hundred eighty-one".