68028121 has 12 divisors (see below), whose sum is σ = 80479440. Its totient is φ = 57319080.

The previous prime is 68028119. The next prime is 68028131. The reversal of 68028121 is 12182086.

It is not a de Polignac number, because 68028121 - 2¹ = 68028119 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 68028121.

It is not an unprimeable number, because it can be changed into a prime (68028131) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 8875 + ... + 14656.

It is an arithmetic number, because the mean of its divisors is an integer number (6706620).

Almost surely, 2^68028121 is an apocalyptic number.

It is an amenable number.

68028121 is a deficient number, since it is larger than the sum of its proper divisors (12451319).

68028121 is a wasteful number, since it uses less digits than its factorization.

68028121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23604 (or 23597 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 28.

The square root of 68028121 is about 8247.9161610676. The cubic root of 68028121 is about 408.2217672528.

The spelling of 68028121 in words is "sixty-eight million, twenty-eight thousand, one hundred twenty-one".