1248139284 has 48 divisors (see below), whose sum is σ = 3334117248. Its totient is φ = 355995648.

The previous prime is 1248139253. The next prime is 1248139301. The reversal of 1248139284 is 4829318421.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 37284 + ... + 62340.

It is an arithmetic number, because the mean of its divisors is an integer number (69460776).

Almost surely, 2^1248139284 is an apocalyptic number.

1248139284 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

1248139284 is an abundant number, since it is smaller than the sum of its proper divisors (2085977964).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1248139284 is a wasteful number, since it uses less digits than its factorization.

1248139284 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25664 (or 25662 counting only the distinct ones).

The product of its digits is 110592, while the sum is 42.

The square root of 1248139284 is about 35329.0147612412. The cubic root of 1248139284 is about 1076.6825740998.

The spelling of 1248139284 in words is "one billion, two hundred forty-eight million, one hundred thirty-nine thousand, two hundred eighty-four".