394542745 has 4 divisors (see below), whose sum is σ = 473451300. Its totient is φ = 315634192.

The previous prime is 394542721. The next prime is 394542751. The reversal of 394542745 is 547245493.

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 172055689 + 222487056 = 13117^2 + 14916^2 .

It is a cyclic number.

It is not a de Polignac number, because 394542745 - 2¹¹ = 394540697 is a prime.

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, 39454270 + ... + 39454279.

It is an arithmetic number, because the mean of its divisors is an integer number (118362825).

Almost surely, 2^394542745 is an apocalyptic number.

It is an amenable number.

394542745 is a deficient number, since it is larger than the sum of its proper divisors (78908555).

394542745 is an equidigital number, since it uses as much as digits as its factorization.

394542745 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 78908554.

The product of its digits is 604800, while the sum is 43.

The square root of 394542745 is about 19863.1000853341. The cubic root of 394542745 is about 733.4401615491.

The spelling of 394542745 in words is "three hundred ninety-four million, five hundred forty-two thousand, seven hundred forty-five".