4205641 has 4 divisors (see below), whose sum is σ = 4587984. Its totient is φ = 3823300.

The previous prime is 4205623. The next prime is 4205651. The reversal of 4205641 is 1465024.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 4205641 - 2⁹ = 4205129 is a prime.

It is a Smith number, since the sum of its digits (22) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (4205611) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 191155 + ... + 191176.

It is an arithmetic number, because the mean of its divisors is an integer number (1146996).

Almost surely, 2^4205641 is an apocalyptic number.

It is an amenable number.

4205641 is a deficient number, since it is larger than the sum of its proper divisors (382343).

4205641 is a wasteful number, since it uses less digits than its factorization.

4205641 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 382342.

The product of its (nonzero) digits is 960, while the sum is 22.

The square root of 4205641 is about 2050.7659544668. The cubic root of 4205641 is about 161.4150652324.

Adding to 4205641 its product of nonzero digits (960), we get a square (4206601 = 2051²).

The spelling of 4205641 in words is "four million, two hundred five thousand, six hundred forty-one".