1242001984 has 56 divisors (see below), whose sum is σ = 2501798400. Its totient is φ = 611702784.

The previous prime is 1242001973. The next prime is 1242001987. The reversal of 1242001984 is 4891002421.

It is not an unprimeable number, because it can be changed into a prime (1242001987) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 1438737 + ... + 1439599.

Almost surely, 2^1242001984 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1242001984, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1250899200).

1242001984 is an abundant number, since it is smaller than the sum of its proper divisors (1259796416).

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

1242001984 is a wasteful number, since it uses less digits than its factorization.

1242001984 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1187 (or 1177 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 31.

The square root of 1242001984 is about 35242.0485216169. The cubic root of 1242001984 is about 1074.9149336690.

The spelling of 1242001984 in words is "one billion, two hundred forty-two million, one thousand, nine hundred eighty-four".