1258717863 has 32 divisors (see below), whose sum is σ = 1824544512. Its totient is φ = 767289600.

The previous prime is 1258717841. The next prime is 1258717877. The reversal of 1258717863 is 3687178521.

It is a happy number.

It is not a de Polignac number, because 1258717863 - 2⁶ = 1258717799 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1258717463) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3627256 + ... + 3627602.

It is an arithmetic number, because the mean of its divisors is an integer number (57017016).

Almost surely, 2^1258717863 is an apocalyptic number.

1258717863 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

1258717863 is a deficient number, since it is larger than the sum of its proper divisors (565826649).

1258717863 is a wasteful number, since it uses less digits than its factorization.

1258717863 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 975.

The product of its digits is 564480, while the sum is 48.

The square root of 1258717863 is about 35478.4140429078. The cubic root of 1258717863 is about 1079.7158211501.

The spelling of 1258717863 in words is "one billion, two hundred fifty-eight million, seven hundred seventeen thousand, eight hundred sixty-three".