1248964889 has 8 divisors (see below), whose sum is σ = 1280163648. Its totient is φ = 1218135600.

The previous prime is 1248964877. The next prime is 1248964897. The reversal of 1248964889 is 9884698421.

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-1248964889 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1248964589) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 85517 + ... + 99050.

It is an arithmetic number, because the mean of its divisors is an integer number (160020456).

Almost surely, 2^1248964889 is an apocalyptic number.

It is an amenable number.

1248964889 is a deficient number, since it is larger than the sum of its proper divisors (31198759).

1248964889 is a wasteful number, since it uses less digits than its factorization.

1248964889 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 184735.

The product of its digits is 7962624, while the sum is 59.

The square root of 1248964889 is about 35340.6973473926. The cubic root of 1248964889 is about 1076.9199190296.

The spelling of 1248964889 in words is "one billion, two hundred forty-eight million, nine hundred sixty-four thousand, eight hundred eighty-nine".