394165042 has 16 divisors (see below), whose sum is σ = 621667800. Its totient is φ = 187165440.

The previous prime is 394165027. The next prime is 394165063. The reversal of 394165042 is 240561493.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 221741881 + 172423161 = 14891^2 + 13131^2 .

It is a junction number, because it is equal to n+sod(n) for n = 394164989 and 394165007.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 52167 + ... + 59242.

Almost surely, 2^394165042 is an apocalyptic number.

394165042 is a deficient number, since it is larger than the sum of its proper divisors (227502758).

394165042 is a wasteful number, since it uses less digits than its factorization.

394165042 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 111501.

The product of its (nonzero) digits is 25920, while the sum is 34.

The square root of 394165042 is about 19853.5901539243. The cubic root of 394165042 is about 733.2060415883.

The spelling of 394165042 in words is "three hundred ninety-four million, one hundred sixty-five thousand, forty-two".