1242439800 has 96 divisors (see below), whose sum is σ = 4401801600. Its totient is φ = 283985280.

The previous prime is 1242439789. The next prime is 1242439813. The reversal of 1242439800 is 89342421.

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 23 ways as a sum of consecutive naturals, for example, 143710 + ... + 152109.

It is an arithmetic number, because the mean of its divisors is an integer number (45852100).

Almost surely, 2^1242439800 is an apocalyptic number.

1242439800 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1242439800 is an abundant number, since it is smaller than the sum of its proper divisors (3159361800).

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

1242439800 is a wasteful number, since it uses less digits than its factorization.

1242439800 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 295845 (or 295836 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 33.

The square root of 1242439800 is about 35248.2595315003. The cubic root of 1242439800 is about 1075.0412243070.

The spelling of 1242439800 in words is "one billion, two hundred forty-two million, four hundred thirty-nine thousand, eight hundred".