3656143 has 4 divisors (see below), whose sum is σ = 3664440. Its totient is φ = 3647848.

The previous prime is 3656141. The next prime is 3656179. The reversal of 3656143 is 3416563.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 3656143 - 2¹ = 3656141 is a prime.

It is an alternating number because its digits alternate between odd and even.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3656141) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3448 + ... + 4381.

It is an arithmetic number, because the mean of its divisors is an integer number (916110).

Almost surely, 2^3656143 is an apocalyptic number.

3656143 is a deficient number, since it is larger than the sum of its proper divisors (8297).

3656143 is an equidigital number, since it uses as much as digits as its factorization.

3656143 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8296.

The product of its digits is 6480, while the sum is 28.

The square root of 3656143 is about 1912.1043381573. The cubic root of 3656143 is about 154.0545008649.

The spelling of 3656143 in words is "three million, six hundred fifty-six thousand, one hundred forty-three".