7850945 has 4 divisors (see below), whose sum is σ = 9421140. Its totient is φ = 6280752.

The previous prime is 7850939. The next prime is 7850951. The reversal of 7850945 is 5490587.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (7850939) and next prime (7850951).

It can be written as a sum of positive squares in 2 ways, for example, as 5513104 + 2337841 = 2348^2 + 1529^2 .

It is a cyclic number.

It is not a de Polignac number, because 7850945 - 2⁴ = 7850929 is a prime.

It is an Ulam number.

It is an alternating number because its digits alternate between odd and even.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 7850899 and 7850908.

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, 785090 + ... + 785099.

It is an arithmetic number, because the mean of its divisors is an integer number (2355285).

Almost surely, 2^7850945 is an apocalyptic number.

It is an amenable number.

7850945 is a deficient number, since it is larger than the sum of its proper divisors (1570195).

7850945 is a wasteful number, since it uses less digits than its factorization.

7850945 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1570194.

The product of its (nonzero) digits is 50400, while the sum is 38.

The square root of 7850945 is about 2801.9537826310. The cubic root of 7850945 is about 198.7500797700.

The spelling of 7850945 in words is "seven million, eight hundred fifty thousand, nine hundred forty-five".