8142005 has 4 divisors (see below), whose sum is σ = 9770412. Its totient is φ = 6513600.

The previous prime is 8141999. The next prime is 8142037. The reversal of 8142005 is 5002418.

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 6436369 + 1705636 = 2537^2 + 1306^2 .

It is not a de Polignac number, because 8142005 - 2¹⁰ = 8140981 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, 814196 + ... + 814205.

It is an arithmetic number, because the mean of its divisors is an integer number (2442603).

Almost surely, 2^8142005 is an apocalyptic number.

It is an amenable number.

8142005 is a deficient number, since it is larger than the sum of its proper divisors (1628407).

8142005 is a wasteful number, since it uses less digits than its factorization.

8142005 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1628406.

The product of its (nonzero) digits is 320, while the sum is 20.

The square root of 8142005 is about 2853.4198779710. The cubic root of 8142005 is about 201.1764413602.

The spelling of 8142005 in words is "eight million, one hundred forty-two thousand, five".