1248288561 has 24 divisors (see below), whose sum is σ = 1945734336. Its totient is φ = 766614240.

The previous prime is 1248288553. The next prime is 1248288607. The reversal of 1248288561 is 1658828421.

1248288561 is a `hidden beast` number, since 1 + 2 + 4 + 8 + 2 + 88 + 561 = 666.

It is not a de Polignac number, because 1248288561 - 2³ = 1248288553 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1248288521) by changing a digit.

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 23 ways as a sum of consecutive naturals, for example, 48246 + ... + 69456.

It is an arithmetic number, because the mean of its divisors is an integer number (81072264).

Almost surely, 2^1248288561 is an apocalyptic number.

It is an amenable number.

1248288561 is a deficient number, since it is larger than the sum of its proper divisors (697445775).

1248288561 is a wasteful number, since it uses less digits than its factorization.

1248288561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21733 (or 21730 counting only the distinct ones).

The product of its digits is 245760, while the sum is 45.

The square root of 1248288561 is about 35331.1273666720. The cubic root of 1248288561 is about 1076.7254960022.

The spelling of 1248288561 in words is "one billion, two hundred forty-eight million, two hundred eighty-eight thousand, five hundred sixty-one".