3205643 has 8 divisors (see below), whose sum is σ = 3762912. Its totient is φ = 2673216.

The previous prime is 3205637. The next prime is 3205651. The reversal of 3205643 is 3465023.

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

It is not a de Polignac number, because 3205643 - 2⁴ = 3205627 is a prime.

It is a super-2 number, since 2×3205643² = 20552294086898, which contains 22 as substring.

It is a d-powerful number, because it can be written as 3¹³ + 2¹³ + 0 + 5 + 6⁵ + 4⁵ + 3¹³ .

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3205603) 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, 5930 + ... + 6447.

It is an arithmetic number, because the mean of its divisors is an integer number (470364).

Almost surely, 2^3205643 is an apocalyptic number.

3205643 is a deficient number, since it is larger than the sum of its proper divisors (557269).

3205643 is a wasteful number, since it uses less digits than its factorization.

3205643 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12421.

The product of its (nonzero) digits is 2160, while the sum is 23.

The square root of 3205643 is about 1790.4309537092. The cubic root of 3205643 is about 147.4478298693.

The spelling of 3205643 in words is "three million, two hundred five thousand, six hundred forty-three".