28245251 has 2 divisors, whose sum is σ = 28245252. Its totient is φ = 28245250.

The previous prime is 28245241. The next prime is 28245253. The reversal of 28245251 is 15254282.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 28245251 - 2¹⁴ = 28228867 is a prime.

It is a Sophie Germain prime.

Together with 28245253, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (28245253) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14122625 + 14122626.

It is an arithmetic number, because the mean of its divisors is an integer number (14122626).

Almost surely, 2^28245251 is an apocalyptic number.

28245251 is a deficient number, since it is larger than the sum of its proper divisors (1).

28245251 is an equidigital number, since it uses as much as digits as its factorization.

28245251 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 6400, while the sum is 29.

The square root of 28245251 is about 5314.6261392501. The cubic root of 28245251 is about 304.5429003505.

It can be divided in two parts, 28245 and 251, that multiplied together give a triangular number (7089495 = T₃₇₆₅).

The spelling of 28245251 in words is "twenty-eight million, two hundred forty-five thousand, two hundred fifty-one".