1121445040 has 80 divisors (see below), whose sum is σ = 2735824896. Its totient is φ = 426694400.

The previous prime is 1121445029. The next prime is 1121445041. The reversal of 1121445040 is 405441211.

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

It is not an unprimeable number, because it can be changed into a prime (1121445041) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 349845 + ... + 353035.

Almost surely, 2^1121445040 is an apocalyptic number.

1121445040 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 1121445040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1367912448).

1121445040 is an abundant number, since it is smaller than the sum of its proper divisors (1614379856).

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

1121445040 is a wasteful number, since it uses less digits than its factorization.

1121445040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3418 (or 3412 counting only the distinct ones).

The product of its (nonzero) digits is 640, while the sum is 22.

The square root of 1121445040 is about 33487.9835164795. The cubic root of 1121445040 is about 1038.9452570968.

Adding to 1121445040 its reverse (405441211), we get a palindrome (1526886251).

The spelling of 1121445040 in words is "one billion, one hundred twenty-one million, four hundred forty-five thousand, forty".