7860145 has 4 divisors (see below), whose sum is σ = 9432180. Its totient is φ = 6288112.

The previous prime is 7860133. The next prime is 7860163. The reversal of 7860145 is 5410687.

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 848241 + 7011904 = 921^2 + 2648^2 .

It is a cyclic number.

It is not a de Polignac number, because 7860145 - 2¹⁵ = 7827377 is a prime.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

7860145 is a lucky number.

It is an unprimeable number.

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, 786010 + ... + 786019.

It is an arithmetic number, because the mean of its divisors is an integer number (2358045).

Almost surely, 2^7860145 is an apocalyptic number.

It is an amenable number.

7860145 is a deficient number, since it is larger than the sum of its proper divisors (1572035).

7860145 is a wasteful number, since it uses less digits than its factorization.

7860145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1572034.

The product of its (nonzero) digits is 6720, while the sum is 31.

The square root of 7860145 is about 2803.5950135496. The cubic root of 7860145 is about 198.8276834626.

The spelling of 7860145 in words is "seven million, eight hundred sixty thousand, one hundred forty-five".