1243860144 has 20 divisors (see below), whose sum is σ = 3213305496. Its totient is φ = 414620032.

The previous prime is 1243860143. The next prime is 1243860157. The reversal of 1243860144 is 4410683421.

It is not an unprimeable number, because it can be changed into a prime (1243860143) 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 3 ways as a sum of consecutive naturals, for example, 12956829 + ... + 12956924.

Almost surely, 2^1243860144 is an apocalyptic number.

It is an amenable number.

1243860144 is an abundant number, since it is smaller than the sum of its proper divisors (1969445352).

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

1243860144 is a wasteful number, since it uses less digits than its factorization.

1243860144 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25913764 (or 25913758 counting only the distinct ones).

The product of its (nonzero) digits is 18432, while the sum is 33.

The square root of 1243860144 is about 35268.4014948225. The cubic root of 1243860144 is about 1075.4507268749.

The spelling of 1243860144 in words is "one billion, two hundred forty-three million, eight hundred sixty thousand, one hundred forty-four".