4143661 has 8 divisors (see below), whose sum is σ = 4270464. Its totient is φ = 4018560.

The previous prime is 4143647. The next prime is 4143673. The reversal of 4143661 is 1663414.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-4143661 is a prime.

It is a Duffinian number.

4143661 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4143641) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5821 + ... + 6493.

It is an arithmetic number, because the mean of its divisors is an integer number (533808).

Almost surely, 2^4143661 is an apocalyptic number.

It is an amenable number.

4143661 is a deficient number, since it is larger than the sum of its proper divisors (126803).

4143661 is a wasteful number, since it uses less digits than its factorization.

4143661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 851.

The product of its digits is 1728, while the sum is 25.

The square root of 4143661 is about 2035.5984378064. The cubic root of 4143661 is about 160.6181943348.

The spelling of 4143661 in words is "four million, one hundred forty-three thousand, six hundred sixty-one".