7685945 has 8 divisors (see below), whose sum is σ = 9238536. Its totient is φ = 6138496.

The previous prime is 7685941. The next prime is 7686011. The reversal of 7685945 is 5495867.

It can be written as a sum of positive squares in 4 ways, for example, as 868624 + 6817321 = 932^2 + 2611^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 7685945 - 2² = 7685941 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 7685896 and 7685905.

It is not an unprimeable number, because it can be changed into a prime (7685941) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3959 + ... + 5571.

It is an arithmetic number, because the mean of its divisors is an integer number (1154817).

Almost surely, 2^7685945 is an apocalyptic number.

It is an amenable number.

7685945 is a deficient number, since it is larger than the sum of its proper divisors (1552591).

7685945 is a wasteful number, since it uses less digits than its factorization.

7685945 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2571.

The product of its digits is 302400, while the sum is 44.

The square root of 7685945 is about 2772.3536931640. The cubic root of 7685945 is about 197.3478612564.

The spelling of 7685945 in words is "seven million, six hundred eighty-five thousand, nine hundred forty-five".