4051605 has 16 divisors (see below), whose sum is σ = 6513984. Its totient is φ = 2150400.

The previous prime is 4051603. The next prime is 4051613. The reversal of 4051605 is 5061504.

It is a happy number.

It is not a de Polignac number, because 4051605 - 2¹ = 4051603 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4051601) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3330 + ... + 4380.

It is an arithmetic number, because the mean of its divisors is an integer number (407124).

Almost surely, 2^4051605 is an apocalyptic number.

It is an amenable number.

4051605 is a deficient number, since it is larger than the sum of its proper divisors (2462379).

4051605 is a wasteful number, since it uses less digits than its factorization.

4051605 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1316.

The product of its (nonzero) digits is 600, while the sum is 21.

The square root of 4051605 is about 2012.8599057063. The cubic root of 4051605 is about 159.4198389792.

It can be divided in two parts, 4051 and 605, that added together give a triangular number (4656 = T₉₆).

The spelling of 4051605 in words is "four million, fifty-one thousand, six hundred five".