1259285887 has 4 divisors (see below), whose sum is σ = 1262208096. Its totient is φ = 1256363680.

The previous prime is 1259285873. The next prime is 1259285921. The reversal of 1259285887 is 7885829521.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 7885829521 = 19 ⋅415043659.

It is a cyclic number.

It is not a de Polignac number, because 1259285887 - 2¹⁵ = 1259253119 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1259288887) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1460458 + ... + 1461319.

It is an arithmetic number, because the mean of its divisors is an integer number (315552024).

Almost surely, 2^1259285887 is an apocalyptic number.

1259285887 is a deficient number, since it is larger than the sum of its proper divisors (2922209).

1259285887 is an equidigital number, since it uses as much as digits as its factorization.

1259285887 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2922208.

The product of its digits is 3225600, while the sum is 55.

The square root of 1259285887 is about 35486.4183456150. The cubic root of 1259285887 is about 1079.8782118613.

The spelling of 1259285887 in words is "one billion, two hundred fifty-nine million, two hundred eighty-five thousand, eight hundred eighty-seven".