4055405 has 4 divisors (see below), whose sum is σ = 4866492. Its totient is φ = 3244320.

The previous prime is 4055399. The next prime is 4055423. The reversal of 4055405 is 5045504.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 808201 + 3247204 = 899^2 + 1802^2 .

It is not a de Polignac number, because 4055405 - 2¹² = 4051309 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 405536 + ... + 405545.

It is an arithmetic number, because the mean of its divisors is an integer number (1216623).

Almost surely, 2^4055405 is an apocalyptic number.

It is an amenable number.

4055405 is a deficient number, since it is larger than the sum of its proper divisors (811087).

4055405 is an equidigital number, since it uses as much as digits as its factorization.

4055405 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 811086.

The product of its (nonzero) digits is 2000, while the sum is 23.

The square root of 4055405 is about 2013.8036150529. The cubic root of 4055405 is about 159.4696633571.

Subtracting 4055405 from its reverse (5045504), we obtain a palindrome (990099).

The spelling of 4055405 in words is "four million, fifty-five thousand, four hundred five".