8140285 has 4 divisors (see below), whose sum is σ = 9768348. Its totient is φ = 6512224.

The previous prime is 8140261. The next prime is 8140291. The reversal of 8140285 is 5820418.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 5820418 = 2 ⋅2910209.

It can be written as a sum of positive squares in 2 ways, for example, as 2859481 + 5280804 = 1691^2 + 2298^2 .

It is a cyclic number.

It is not a de Polignac number, because 8140285 - 2⁹ = 8139773 is a prime.

It is a Duffinian number.

8140285 is a lucky 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, 814024 + ... + 814033.

It is an arithmetic number, because the mean of its divisors is an integer number (2442087).

Almost surely, 2^8140285 is an apocalyptic number.

It is an amenable number.

8140285 is a deficient number, since it is larger than the sum of its proper divisors (1628063).

8140285 is a wasteful number, since it uses less digits than its factorization.

8140285 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1628062.

The product of its (nonzero) digits is 2560, while the sum is 28.

The square root of 8140285 is about 2853.1184693244. The cubic root of 8140285 is about 201.1622741762.

The spelling of 8140285 in words is "eight million, one hundred forty thousand, two hundred eighty-five".