7863145 has 4 divisors (see below), whose sum is σ = 9435780. Its totient is φ = 6290512.

The previous prime is 7863143. The next prime is 7863161. The reversal of 7863145 is 5413687.

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 2903616 + 4959529 = 1704^2 + 2227^2 .

It is a cyclic number.

It is not a de Polignac number, because 7863145 - 2¹ = 7863143 is a prime.

7863145 is a lucky number.

It is a self number, because there is not a number n which added to its sum of digits gives 7863145.

It is not an unprimeable number, because it can be changed into a prime (7863143) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 786310 + ... + 786319.

It is an arithmetic number, because the mean of its divisors is an integer number (2358945).

Almost surely, 2^7863145 is an apocalyptic number.

It is an amenable number.

7863145 is a deficient number, since it is larger than the sum of its proper divisors (1572635).

7863145 is a wasteful number, since it uses less digits than its factorization.

7863145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1572634.

The product of its digits is 20160, while the sum is 34.

The square root of 7863145 is about 2804.1299898543. The cubic root of 7863145 is about 198.8529759213.

It can be divided in two parts, 7863 and 145, that added together give a palindrome (8008).

The spelling of 7863145 in words is "seven million, eight hundred sixty-three thousand, one hundred forty-five".