4312681 has 4 divisors (see below), whose sum is σ = 4317012. Its totient is φ = 4308352.

The previous prime is 4312657. The next prime is 4312691. The reversal of 4312681 is 1862134.

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, and also an emirpimes, since its reverse is a distinct semiprime: 1862134 = 2 ⋅931067.

It can be written as a sum of positive squares in 2 ways, for example, as 549081 + 3763600 = 741^2 + 1940^2 .

It is a cyclic number.

It is not a de Polignac number, because 4312681 - 2¹¹ = 4310633 is a prime.

It is a super-2 number, since 2×4312681² = 37198434815522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (4312631) 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, 165 + ... + 2941.

It is an arithmetic number, because the mean of its divisors is an integer number (1079253).

It is a 996-hyperperfect number.

Almost surely, 2^4312681 is an apocalyptic number.

It is an amenable number.

4312681 is a deficient number, since it is larger than the sum of its proper divisors (4331).

4312681 is a wasteful number, since it uses less digits than its factorization.

4312681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4330.

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

The square root of 4312681 is about 2076.6995449511. The cubic root of 4312681 is about 162.7730289742.

It can be divided in two parts, 431 and 2681, that multiplied together give a palindrome (1155511).

The spelling of 4312681 in words is "four million, three hundred twelve thousand, six hundred eighty-one".