1258564855 has 4 divisors (see below), whose sum is σ = 1510277832. Its totient is φ = 1006851880.

The previous prime is 1258564843. The next prime is 1258564889. The reversal of 1258564855 is 5584658521.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 5584658521 = 13 ⋅429589117.

It is not a de Polignac number, because 1258564855 - 2⁹ = 1258564343 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1258564799 and 1258564808.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 125856481 + ... + 125856490.

It is an arithmetic number, because the mean of its divisors is an integer number (377569458).

Almost surely, 2^1258564855 is an apocalyptic number.

1258564855 is a deficient number, since it is larger than the sum of its proper divisors (251712977).

1258564855 is an equidigital number, since it uses as much as digits as its factorization.

1258564855 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 251712976.

The product of its digits is 1920000, while the sum is 49.

The square root of 1258564855 is about 35476.2576239377. The cubic root of 1258564855 is about 1079.6720697906.

The spelling of 1258564855 in words is "one billion, two hundred fifty-eight million, five hundred sixty-four thousand, eight hundred fifty-five".