3405643 has 4 divisors (see below), whose sum is σ = 3484888. Its totient is φ = 3326400.

The previous prime is 3405641. The next prime is 3405653. The reversal of 3405643 is 3465043.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3465043 = 701 ⋅4943.

It is a cyclic number.

It is not a de Polignac number, because 3405643 - 2¹ = 3405641 is a prime.

It is a Duffinian number.

3405643 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (3405641) 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, 39558 + ... + 39643.

It is an arithmetic number, because the mean of its divisors is an integer number (871222).

Almost surely, 2^3405643 is an apocalyptic number.

3405643 is a deficient number, since it is larger than the sum of its proper divisors (79245).

3405643 is an equidigital number, since it uses as much as digits as its factorization.

3405643 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 79244.

The product of its (nonzero) digits is 4320, while the sum is 25.

The square root of 3405643 is about 1845.4384302924. The cubic root of 3405643 is about 150.4526033316.

The spelling of 3405643 in words is "three million, four hundred five thousand, six hundred forty-three".