68121345 has 16 divisors (see below), whose sum is σ = 109628352. Its totient is φ = 36120000.

The previous prime is 68121343. The next prime is 68121359. The reversal of 68121345 is 54312186.

It is not a de Polignac number, because 68121345 - 2¹ = 68121343 is a prime.

It is not an unprimeable number, because it can be changed into a prime (68121343) 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 15 ways as a sum of consecutive naturals, for example, 10531 + ... + 15720.

It is an arithmetic number, because the mean of its divisors is an integer number (6851772).

Almost surely, 2^68121345 is an apocalyptic number.

It is an amenable number.

68121345 is a deficient number, since it is larger than the sum of its proper divisors (41507007).

68121345 is a wasteful number, since it uses less digits than its factorization.

68121345 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26432.

The product of its digits is 5760, while the sum is 30.

The square root of 68121345 is about 8253.5655931240. The cubic root of 68121345 is about 408.4081543674.

The spelling of 68121345 in words is "sixty-eight million, one hundred twenty-one thousand, three hundred forty-five".