396121 has 4 divisors (see below), whose sum is σ = 432144. Its totient is φ = 360100.

The previous prime is 396119. The next prime is 396157. The reversal of 396121 is 121693.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 396121 - 2¹ = 396119 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 396092 and 396101.

It is not an unprimeable number, because it can be changed into a prime (396181) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 17995 + ... + 18016.

It is an arithmetic number, because the mean of its divisors is an integer number (108036).

2³⁹⁶¹²¹ is an apocalyptic number.

It is an amenable number.

396121 is a deficient number, since it is larger than the sum of its proper divisors (36023).

396121 is a wasteful number, since it uses less digits than its factorization.

396121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36022.

The product of its digits is 324, while the sum is 22.

The square root of 396121 is about 629.3814423702. The cubic root of 396121 is about 73.4416832686.

The spelling of 396121 in words is "three hundred ninety-six thousand, one hundred twenty-one".