68121075 has 24 divisors (see below), whose sum is σ = 122867136. Its totient is φ = 33028000.

The previous prime is 68121041. The next prime is 68121089. The reversal of 68121075 is 57012186.

It is a de Polignac number, because none of the positive numbers 2^k-68121075 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 40461 + ... + 42110.

It is an arithmetic number, because the mean of its divisors is an integer number (5119464).

Almost surely, 2^68121075 is an apocalyptic number.

68121075 is a deficient number, since it is larger than the sum of its proper divisors (54746061).

68121075 is a wasteful number, since it uses less digits than its factorization.

68121075 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 82595 (or 82590 counting only the distinct ones).

The product of its (nonzero) digits is 3360, while the sum is 30.

The square root of 68121075 is about 8253.5492365406. The cubic root of 68121075 is about 408.4076147894.

Subtracting from 68121075 its reverse (57012186), we obtain a square (11108889 = 3333²).

It can be divided in two parts, 6812 and 1075, that added together give a palindrome (7887).

The spelling of 68121075 in words is "sixty-eight million, one hundred twenty-one thousand, seventy-five".