394866121 has 16 divisors (see below), whose sum is σ = 436625280. Its totient is φ = 354775680.

The previous prime is 394866107. The next prime is 394866149. The reversal of 394866121 is 121668493.

It is a cyclic number.

It is not a de Polignac number, because 394866121 - 2⁹ = 394865609 is a prime.

It is not an unprimeable number, because it can be changed into a prime (394866181) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 446746 + ... + 447628.

It is an arithmetic number, because the mean of its divisors is an integer number (27289080).

Almost surely, 2^394866121 is an apocalyptic number.

It is an amenable number.

394866121 is a deficient number, since it is larger than the sum of its proper divisors (41759159).

394866121 is a wasteful number, since it uses less digits than its factorization.

394866121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1776.

The product of its digits is 62208, while the sum is 40.

The square root of 394866121 is about 19871.2385371421. The cubic root of 394866121 is about 733.6404881125.

The spelling of 394866121 in words is "three hundred ninety-four million, eight hundred sixty-six thousand, one hundred twenty-one".