3156643 has 4 divisors (see below), whose sum is σ = 3607600. Its totient is φ = 2705688.

The previous prime is 3156619. The next prime is 3156649. The reversal of 3156643 is 3466513.

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 3156643 - 2¹⁷ = 3025571 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3156649) 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, 225468 + ... + 225481.

It is an arithmetic number, because the mean of its divisors is an integer number (901900).

Almost surely, 2^3156643 is an apocalyptic number.

3156643 is a deficient number, since it is larger than the sum of its proper divisors (450957).

3156643 is an equidigital number, since it uses as much as digits as its factorization.

3156643 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 450956.

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

The square root of 3156643 is about 1776.6944025352. The cubic root of 3156643 is about 146.6926956788.

The spelling of 3156643 in words is "three million, one hundred fifty-six thousand, six hundred forty-three".