28560251 has 2 divisors, whose sum is σ = 28560252. Its totient is φ = 28560250.

The previous prime is 28560241. The next prime is 28560353. The reversal of 28560251 is 15206582.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-28560251 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (28560241) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14280125 + 14280126.

It is an arithmetic number, because the mean of its divisors is an integer number (14280126).

Almost surely, 2^28560251 is an apocalyptic number.

28560251 is a deficient number, since it is larger than the sum of its proper divisors (1).

28560251 is an equidigital number, since it uses as much as digits as its factorization.

28560251 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4800, while the sum is 29.

The square root of 28560251 is about 5344.1791699006. The cubic root of 28560251 is about 305.6708373280.

The spelling of 28560251 in words is "twenty-eight million, five hundred sixty thousand, two hundred fifty-one".