2144405 has 16 divisors (see below), whose sum is σ = 2782080. Its totient is φ = 1581888.

The previous prime is 2144399. The next prime is 2144407. The reversal of 2144405 is 5044412.

It is a cyclic number.

It is not a de Polignac number, because 2144405 - 2¹⁰ = 2143381 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2144407) 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, 3014 + ... + 3656.

It is an arithmetic number, because the mean of its divisors is an integer number (173880).

2^2144405 is an apocalyptic number.

It is an amenable number.

2144405 is a deficient number, since it is larger than the sum of its proper divisors (637675).

2144405 is a wasteful number, since it uses less digits than its factorization.

2144405 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 700.

The product of its (nonzero) digits is 640, while the sum is 20.

The square root of 2144405 is about 1464.3787078485. The cubic root of 2144405 is about 128.9542333091.

Adding to 2144405 its reverse (5044412), we get a palindrome (7188817).

The spelling of 2144405 in words is "two million, one hundred forty-four thousand, four hundred five".