7143681 has 8 divisors (see below), whose sum is σ = 9553600. Its totient is φ = 4748112.

The previous prime is 7143679. The next prime is 7143683. The reversal of 7143681 is 1863417.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (7143679) and next prime (7143683).

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 7143681 - 2¹ = 7143679 is a prime.

It is a super-2 number, since 2×7143681² = 102064356459522, which contains 22 as substring.

It is a Duffinian number.

7143681 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (7143683) 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 7 ways as a sum of consecutive naturals, for example, 2365 + ... + 4458.

It is an arithmetic number, because the mean of its divisors is an integer number (1194200).

Almost surely, 2^7143681 is an apocalyptic number.

It is an amenable number.

7143681 is a deficient number, since it is larger than the sum of its proper divisors (2409919).

7143681 is a wasteful number, since it uses less digits than its factorization.

7143681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7175.

The product of its digits is 4032, while the sum is 30.

The square root of 7143681 is about 2672.7665442384. The cubic root of 7143681 is about 192.5930825482.

It can be divided in two parts, 71436 and 81, that added together give a palindrome (71517).

The spelling of 7143681 in words is "seven million, one hundred forty-three thousand, six hundred eighty-one".