1243110400 has 198 divisors, whose sum is σ = 3588112608. Its totient is φ = 425779200.

The previous prime is 1243110347. The next prime is 1243110413. The reversal of 1243110400 is 40113421.

It is a Harshad number since it is a multiple of its sum of digits (16).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 1253905 + ... + 1254895.

Almost surely, 2^1243110400 is an apocalyptic number.

1243110400 is a gapful number since it is divisible by the number (10) 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 1243110400, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1794056304).

1243110400 is an abundant number, since it is smaller than the sum of its proper divisors (2345002208).

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

1243110400 is an equidigital number, since it uses as much as digits as its factorization.

1243110400 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1035 (or 1005 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 16.

The square root of 1243110400 is about 35257.7707746817. The cubic root of 1243110400 is about 1075.2346053677.

Adding to 1243110400 its reverse (40113421), we get a palindrome (1283223821).

The spelling of 1243110400 in words is "one billion, two hundred forty-three million, one hundred ten thousand, four hundred".