8721259 has 2 divisors, whose sum is σ = 8721260. Its totient is φ = 8721258.

The previous prime is 8721253. The next prime is 8721269. The reversal of 8721259 is 9521278.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 8721259 - 2¹¹ = 8719211 is a prime.

It is not a weakly prime, because it can be changed into another prime (8721253) 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 as a sum of consecutive naturals, namely, 4360629 + 4360630.

It is an arithmetic number, because the mean of its divisors is an integer number (4360630).

Almost surely, 2^8721259 is an apocalyptic number.

8721259 is a deficient number, since it is larger than the sum of its proper divisors (1).

8721259 is an equidigital number, since it uses as much as digits as its factorization.

8721259 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 10080, while the sum is 34.

The square root of 8721259 is about 2953.1777799516. The cubic root of 8721259 is about 205.8383987272.

The spelling of 8721259 in words is "eight million, seven hundred twenty-one thousand, two hundred fifty-nine".