392121 has 20 divisors (see below), whose sum is σ = 604032. Its totient is φ = 253368.

The previous prime is 392113. The next prime is 392131. The reversal of 392121 is 121293.

It is a happy number.

It is not a de Polignac number, because 392121 - 2³ = 392113 is a prime.

It is a hoax number, since the sum of its digits (18) coincides with the sum of the digits of its distinct prime factors.

392121 is a Rhonda number in base 4.

It is a Curzon number.

392121 is a lucky number.

It is a junction number, because it is equal to n+sod(n) for n = 392094 and 392103.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 392121.

It is not an unprimeable number, because it can be changed into a prime (392101) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 3756 + ... + 3858.

2³⁹²¹²¹ is an apocalyptic number.

It is an amenable number.

392121 is a deficient number, since it is larger than the sum of its proper divisors (211911).

392121 is a wasteful number, since it uses less digits than its factorization.

392121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 162 (or 153 counting only the distinct ones).

The product of its digits is 108, while the sum is 18.

The square root of 392121 is about 626.1956563248. The cubic root of 392121 is about 73.1936436297.

The spelling of 392121 in words is "three hundred ninety-two thousand, one hundred twenty-one".