392121234 has 12 divisors (see below), whose sum is σ = 849596046. Its totient is φ = 130707072.

The previous prime is 392121217. The next prime is 392121241. The reversal of 392121234 is 432121293.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 346518225 + 45603009 = 18615^2 + 6753^2 .

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 392121198 and 392121207.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 10892239 + ... + 10892274.

Almost surely, 2^392121234 is an apocalyptic number.

392121234 is an abundant number, since it is smaller than the sum of its proper divisors (457474812).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

392121234 is a wasteful number, since it uses less digits than its factorization.

392121234 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21784521 (or 21784518 counting only the distinct ones).

The product of its digits is 2592, while the sum is 27.

The square root of 392121234 is about 19802.0512573824. The cubic root of 392121234 is about 731.9365818927.

The spelling of 392121234 in words is "three hundred ninety-two million, one hundred twenty-one thousand, two hundred thirty-four".