4200805 has 16 divisors (see below), whose sum is σ = 6065280. Its totient is φ = 2728512.

The previous prime is 4200803. The next prime is 4200809. The reversal of 4200805 is 5080024.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 4200805 - 2¹ = 4200803 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (19).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4200803) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2494 + ... + 3823.

It is an arithmetic number, because the mean of its divisors is an integer number (379080).

Almost surely, 2^4200805 is an apocalyptic number.

It is an amenable number.

4200805 is a deficient number, since it is larger than the sum of its proper divisors (1864475).

4200805 is a wasteful number, since it uses less digits than its factorization.

4200805 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6348.

The product of its (nonzero) digits is 320, while the sum is 19.

The square root of 4200805 is about 2049.5865436717. The cubic root of 4200805 is about 161.3531719603.

Multiplying 4200805 by its sum of digits (19), we get a triangular number (79815295 = T₁₂₆₃₄).

Adding to 4200805 its reverse (5080024), we get a palindrome (9280829).

It can be divided in two parts, 4200 and 805, that added together give a palindrome (5005).

The spelling of 4200805 in words is "four million, two hundred thousand, eight hundred five".