7865042 has 4 divisors (see below), whose sum is σ = 11797566. Its totient is φ = 3932520.

The previous prime is 7865023. The next prime is 7865047. The reversal of 7865042 is 2405687.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 2405687 = 17 ⋅141511.

It can be written as a sum of positive squares in only one way, i.e., 5527201 + 2337841 = 2351^2 + 1529^2 .

It is not an unprimeable number, because it can be changed into a prime (7865047) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1966259 + ... + 1966262.

Almost surely, 2^7865042 is an apocalyptic number.

7865042 is a deficient number, since it is larger than the sum of its proper divisors (3932524).

7865042 is a wasteful number, since it uses less digits than its factorization.

7865042 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3932523.

The product of its (nonzero) digits is 13440, while the sum is 32.

The square root of 7865042 is about 2804.4682205366. The cubic root of 7865042 is about 198.8689658661.

The spelling of 7865042 in words is "seven million, eight hundred sixty-five thousand, forty-two".