1125443440 has 80 divisors (see below), whose sum is σ = 2924250336. Its totient is φ = 399257600.

The previous prime is 1125443413. The next prime is 1125443453. The reversal of 1125443440 is 443445211.

It is a tau number, because it is divible by the number of its divisors (80).

It is a junction number, because it is equal to n+sod(n) for n = 1125443399 and 1125443408.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 20484 + ... + 51676.

Almost surely, 2^1125443440 is an apocalyptic number.

1125443440 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 1125443440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1462125168).

1125443440 is an abundant number, since it is smaller than the sum of its proper divisors (1798806896).

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

1125443440 is a wasteful number, since it uses less digits than its factorization.

1125443440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31258 (or 31252 counting only the distinct ones).

The product of its (nonzero) digits is 7680, while the sum is 28.

The square root of 1125443440 is about 33547.6294244467. The cubic root of 1125443440 is about 1040.1785442969.

Adding to 1125443440 its reverse (443445211), we get a palindrome (1568888651).

The spelling of 1125443440 in words is "one billion, one hundred twenty-five million, four hundred forty-three thousand, four hundred forty".