1248120889 has 8 divisors (see below), whose sum is σ = 1282993088. Its totient is φ = 1213308720.

The previous prime is 1248120877. The next prime is 1248120911. The reversal of 1248120889 is 9880218421.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1248120889 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1248120389) 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 7 ways as a sum of consecutive naturals, for example, 28924 + ... + 57730.

It is an arithmetic number, because the mean of its divisors is an integer number (160374136).

Almost surely, 2^1248120889 is an apocalyptic number.

It is an amenable number.

1248120889 is a deficient number, since it is larger than the sum of its proper divisors (34872199).

1248120889 is a wasteful number, since it uses less digits than its factorization.

1248120889 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30015.

The product of its (nonzero) digits is 73728, while the sum is 43.

The square root of 1248120889 is about 35328.7544218587. The cubic root of 1248120889 is about 1076.6772847133.

The spelling of 1248120889 in words is "one billion, two hundred forty-eight million, one hundred twenty thousand, eight hundred eighty-nine".