1243097856 has 648 divisors, whose sum is σ = 4947706400. Its totient is φ = 298045440.

The previous prime is 1243097837. The next prime is 1243097887. The reversal of 1243097856 is 6587903421.

1243097856 is digitally balanced in base 10, because in such base it contains all the possibile digits an equal number of times.

1243097856 is strictly pandigital in base 10.

It is an unprimeable number.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 95622906 + ... + 95622918.

It is a 1-persistent number, because it is pandigital, but 2⋅1243097856 = 2486195712 is not.

Almost surely, 2^1243097856 is an apocalyptic number.

1243097856 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1243097856, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2473853200).

1243097856 is an abundant number, since it is smaller than the sum of its proper divisors (3704608544).

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

1243097856 is a wasteful number, since it uses less digits than its factorization.

1243097856 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 78 (or 36 counting only the distinct ones).

The product of its (nonzero) digits is 362880, while the sum is 45.

The square root of 1243097856 is about 35257.5928843703. The cubic root of 1243097856 is about 1075.2309886902.

The spelling of 1243097856 in words is "one billion, two hundred forty-three million, ninety-seven thousand, eight hundred fifty-six".