1142259200 has 120 divisors (see below), whose sum is σ = 2849603328. Its totient is φ = 453754880.

The previous prime is 1142259199. The next prime is 1142259203. The reversal of 1142259200 is 29522411.

It is a self number, because there is not a number n which added to its sum of digits gives 1142259200.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1142259203) 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 11 ways as a sum of consecutive naturals, for example, 2982209 + ... + 2982591.

Almost surely, 2^1142259200 is an apocalyptic number.

1142259200 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 1142259200, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1424801664).

1142259200 is an abundant number, since it is smaller than the sum of its proper divisors (1707344128).

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

1142259200 is an equidigital number, since it uses as much as digits as its factorization.

1142259200 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 644 (or 623 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 26.

The square root of 1142259200 is about 33797.3253379613. The cubic root of 1142259200 is about 1045.3335473645. Note that the first 3 decimals are identical.

The spelling of 1142259200 in words is "one billion, one hundred forty-two million, two hundred fifty-nine thousand, two hundred".