1248315805 has 48 divisors (see below), whose sum is σ = 1714063680. Its totient is φ = 865267200.

The previous prime is 1248315799. The next prime is 1248315829. The reversal of 1248315805 is 5085138421.

It is not a de Polignac number, because 1248315805 - 2²³ = 1239927197 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (37).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 4442265 + ... + 4442545.

It is an arithmetic number, because the mean of its divisors is an integer number (35709660).

Almost surely, 2^1248315805 is an apocalyptic number.

It is an amenable number.

1248315805 is a deficient number, since it is larger than the sum of its proper divisors (465747875).

1248315805 is a wasteful number, since it uses less digits than its factorization.

1248315805 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 430 (or 393 counting only the distinct ones).

The product of its (nonzero) digits is 38400, while the sum is 37.

The square root of 1248315805 is about 35331.5129169414. The cubic root of 1248315805 is about 1076.7333291525.

The spelling of 1248315805 in words is "one billion, two hundred forty-eight million, three hundred fifteen thousand, eight hundred five".