68280525 has 18 divisors (see below), whose sum is σ = 122298410. Its totient is φ = 36416160.

The previous prime is 68280521. The next prime is 68280557. The reversal of 68280525 is 52508286.

It can be written as a sum of positive squares in 3 ways, for example, as 19881 + 68260644 = 141^2 + 8262^2 .

It is not a de Polignac number, because 68280525 - 2² = 68280521 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 68280525.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68280521) 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 17 ways as a sum of consecutive naturals, for example, 151510 + ... + 151959.

Almost surely, 2^68280525 is an apocalyptic number.

It is an amenable number.

68280525 is a deficient number, since it is larger than the sum of its proper divisors (54017885).

68280525 is a wasteful number, since it uses less digits than its factorization.

68280525 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 303485 (or 303477 counting only the distinct ones).

The product of its (nonzero) digits is 38400, while the sum is 36.

The square root of 68280525 is about 8263.2030714487. The cubic root of 68280525 is about 408.7260177271.

The spelling of 68280525 in words is "sixty-eight million, two hundred eighty thousand, five hundred twenty-five".