68451725 has 12 divisors (see below), whose sum is σ = 85015764. Its totient is φ = 54673920.

The previous prime is 68451709. The next prime is 68451727. The reversal of 68451725 is 52715486.

It can be written as a sum of positive squares in 6 ways, for example, as 12411529 + 56040196 = 3523^2 + 7486^2 .

It is not a de Polignac number, because 68451725 - 2⁴ = 68451709 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68451727) by changing a digit.

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 11 ways as a sum of consecutive naturals, for example, 17117 + ... + 20733.

It is an arithmetic number, because the mean of its divisors is an integer number (7084647).

Almost surely, 2^68451725 is an apocalyptic number.

It is an amenable number.

68451725 is a deficient number, since it is larger than the sum of its proper divisors (16564039).

68451725 is a wasteful number, since it uses less digits than its factorization.

68451725 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4384 (or 4379 counting only the distinct ones).

The product of its digits is 67200, while the sum is 38.

The square root of 68451725 is about 8273.5557652076. Note that the first 3 decimals coincide. The cubic root of 68451725 is about 409.0673326854.

The spelling of 68451725 in words is "sixty-eight million, four hundred fifty-one thousand, seven hundred twenty-five".