8042513 has 4 divisors (see below), whose sum is σ = 8515620. Its totient is φ = 7569408.

The previous prime is 8042509. The next prime is 8042521. The reversal of 8042513 is 3152408.

8042513 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

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 4631104 + 3411409 = 2152^2 + 1847^2 .

It is a cyclic number.

It is not a de Polignac number, because 8042513 - 2² = 8042509 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (8042533) by changing a digit.

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, 236528 + ... + 236561.

It is an arithmetic number, because the mean of its divisors is an integer number (2128905).

Almost surely, 2^8042513 is an apocalyptic number.

It is an amenable number.

8042513 is a deficient number, since it is larger than the sum of its proper divisors (473107).

8042513 is a wasteful number, since it uses less digits than its factorization.

8042513 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 473106.

The product of its (nonzero) digits is 960, while the sum is 23.

The square root of 8042513 is about 2835.9324745135. The cubic root of 8042513 is about 200.3536492923.

The spelling of 8042513 in words is "eight million, forty-two thousand, five hundred thirteen".