121838306 has 16 divisors (see below), whose sum is σ = 187813080. Its totient is φ = 59243520.

The previous prime is 121838287. The next prime is 121838329. The reversal of 121838306 is 603838121.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 30349081 + 91489225 = 5509^2 + 9565^2 .

It is a Curzon number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 25430 + ... + 29838.

Almost surely, 2^121838306 is an apocalyptic number.

121838306 is a deficient number, since it is larger than the sum of its proper divisors (65974774).

121838306 is a wasteful number, since it uses less digits than its factorization.

121838306 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4789.

The product of its (nonzero) digits is 6912, while the sum is 32.

The square root of 121838306 is about 11038.0390468597. The cubic root of 121838306 is about 495.7483575458.

The spelling of 121838306 in words is "one hundred twenty-one million, eight hundred thirty-eight thousand, three hundred six".