1248805761 has 16 divisors (see below), whose sum is σ = 2003097600. Its totient is φ = 676045008.

The previous prime is 1248805729. The next prime is 1248805763. The reversal of 1248805761 is 1675088421.

It is not a de Polignac number, because 1248805761 - 2⁵ = 1248805729 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1248805763) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1564521 + ... + 1565318.

It is an arithmetic number, because the mean of its divisors is an integer number (125193600).

Almost surely, 2^1248805761 is an apocalyptic number.

It is an amenable number.

1248805761 is a deficient number, since it is larger than the sum of its proper divisors (754291839).

1248805761 is a wasteful number, since it uses less digits than its factorization.

1248805761 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3129868.

The product of its (nonzero) digits is 107520, while the sum is 42.

The square root of 1248805761 is about 35338.4459335721. The cubic root of 1248805761 is about 1076.8741810501.

The spelling of 1248805761 in words is "one billion, two hundred forty-eight million, eight hundred five thousand, seven hundred sixty-one".