7957945 has 4 divisors (see below), whose sum is σ = 9549540. Its totient is φ = 6366352.

The previous prime is 7957909. The next prime is 7957951. The reversal of 7957945 is 5497597.

It is a happy number.

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 5861241 + 2096704 = 2421^2 + 1448^2 .

It is a cyclic number.

It is not a de Polignac number, because 7957945 - 2¹¹ = 7955897 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 7957895 and 7957904.

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, 795790 + ... + 795799.

It is an arithmetic number, because the mean of its divisors is an integer number (2387385).

Almost surely, 2^7957945 is an apocalyptic number.

It is an amenable number.

7957945 is a deficient number, since it is larger than the sum of its proper divisors (1591595).

7957945 is a wasteful number, since it uses less digits than its factorization.

7957945 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1591594.

The product of its digits is 396900, while the sum is 46.

The square root of 7957945 is about 2820.9829847059. The cubic root of 7957945 is about 199.6489257617.

The spelling of 7957945 in words is "seven million, nine hundred fifty-seven thousand, nine hundred forty-five".