3143681 has 4 divisors (see below), whose sum is σ = 3147312. Its totient is φ = 3140052.

The previous prime is 3143671. The next prime is 3143711. The reversal of 3143681 is 1863413.

3143681 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, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 3143681 - 2¹⁴ = 3127297 is a prime.

It is a super-2 number, since 2×3143681² = 19765460459522, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 3143681.

It is not an unprimeable number, because it can be changed into a prime (3143641) 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, 326 + ... + 2528.

It is an arithmetic number, because the mean of its divisors is an integer number (786828).

It is a Proth number, since it is equal to 1535 ⋅ 2¹¹ + 1 and 1535 < 2¹¹.

Almost surely, 2^3143681 is an apocalyptic number.

It is an amenable number.

3143681 is a deficient number, since it is larger than the sum of its proper divisors (3631).

3143681 is a wasteful number, since it uses less digits than its factorization.

3143681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3630.

The product of its digits is 1728, while the sum is 26.

The square root of 3143681 is about 1773.0428646821. The cubic root of 3143681 is about 146.4916340589.

The spelling of 3143681 in words is "three million, one hundred forty-three thousand, six hundred eighty-one".