1145491200 has 432 divisors, whose sum is σ = 4805525760. Its totient is φ = 261550080.

The previous prime is 1145491159. The next prime is 1145491201. The reversal of 1145491200 is 21945411.

1145491200 is a `hidden beast` number, since 1 + 1 + 454 + 9 + 1 + 200 = 666.

It is a tau number, because it is divible by the number of its divisors (432).

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1145491201) 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 47 ways as a sum of consecutive naturals, for example, 1209127 + ... + 1210073.

Almost surely, 2^1145491200 is an apocalyptic number.

1145491200 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 1145491200, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2402762880).

1145491200 is an abundant number, since it is smaller than the sum of its proper divisors (3660034560).

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

1145491200 is an equidigital number, since it uses as much as digits as its factorization.

1145491200 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 989 (or 964 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 27.

The square root of 1145491200 is about 33845.1059977658. The cubic root of 1145491200 is about 1046.3185358683.

The spelling of 1145491200 in words is "one billion, one hundred forty-five million, four hundred ninety-one thousand, two hundred".