121285839 has 8 divisors (see below), whose sum is σ = 161845632. Its totient is φ = 80791640.

The previous prime is 121285823. The next prime is 121285841. The reversal of 121285839 is 938582121.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 121285839 - 2⁴ = 121285823 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 121285797 and 121285806.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121285849) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 11907 + ... + 19604.

It is an arithmetic number, because the mean of its divisors is an integer number (20230704).

Almost surely, 2^121285839 is an apocalyptic number.

121285839 is a deficient number, since it is larger than the sum of its proper divisors (40559793).

121285839 is a wasteful number, since it uses less digits than its factorization.

121285839 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32797.

The product of its digits is 34560, while the sum is 39.

The square root of 121285839 is about 11012.9850176962. The cubic root of 121285839 is about 494.9979104085.

The spelling of 121285839 in words is "one hundred twenty-one million, two hundred eighty-five thousand, eight hundred thirty-nine".