2054405 has 6 divisors (see below), whose sum is σ = 2469138. Its totient is φ = 1640960.

The previous prime is 2054369. The next prime is 2054443. The reversal of 2054405 is 5044502.

It is a happy number.

It can be written as a sum of positive squares in 3 ways, for example, as 1036324 + 1018081 = 1018^2 + 1009^2 .

It is not a de Polignac number, because 2054405 - 2⁶ = 2054341 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2885 + ... + 3525.

It is an arithmetic number, because the mean of its divisors is an integer number (411523).

2^2054405 is an apocalyptic number.

It is an amenable number.

2054405 is a deficient number, since it is larger than the sum of its proper divisors (414733).

2054405 is an frugal number, since it uses more digits than its factorization.

2054405 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1287 (or 646 counting only the distinct ones).

The product of its (nonzero) digits is 800, while the sum is 20.

The square root of 2054405 is about 1433.3195735774. The cubic root of 2054405 is about 127.1243331535.

Multiplying 2054405 by its sum of digits (20), we get a square (41088100 = 6410²).

Adding to 2054405 its reverse (5044502), we get a palindrome (7098907).

The spelling of 2054405 in words is "two million, fifty-four thousand, four hundred five".