8144405 has 4 divisors (see below), whose sum is σ = 9773292. Its totient is φ = 6515520.

The previous prime is 8144399. The next prime is 8144429. The reversal of 8144405 is 5044418.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 5044418 = 2 ⋅2522209.

It can be written as a sum of positive squares in 2 ways, for example, as 1164241 + 6980164 = 1079^2 + 2642^2 .

It is not a de Polignac number, because 8144405 - 2⁶ = 8144341 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 3 ways as a sum of consecutive naturals, for example, 814436 + ... + 814445.

It is an arithmetic number, because the mean of its divisors is an integer number (2443323).

Almost surely, 2^8144405 is an apocalyptic number.

It is an amenable number.

8144405 is a deficient number, since it is larger than the sum of its proper divisors (1628887).

8144405 is a wasteful number, since it uses less digits than its factorization.

8144405 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1628886.

The product of its (nonzero) digits is 2560, while the sum is 26.

The square root of 8144405 is about 2853.8403949766. The cubic root of 8144405 is about 201.1962061899.

The spelling of 8144405 in words is "eight million, one hundred forty-four thousand, four hundred five".