1121501440 has 72 divisors (see below), whose sum is σ = 2707891200. Its totient is φ = 445003776.

The previous prime is 1121501431. The next prime is 1121501449. The reversal of 1121501440 is 441051211.

It is an interprime number because it is at equal distance from previous prime (1121501431) and next prime (1121501449).

It is not an unprimeable number, because it can be changed into a prime (1121501449) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 159111 + ... + 166009.

It is an arithmetic number, because the mean of its divisors is an integer number (37609600).

Almost surely, 2^1121501440 is an apocalyptic number.

1121501440 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 1121501440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1353945600).

1121501440 is an abundant number, since it is smaller than the sum of its proper divisors (1586389760).

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

1121501440 is an equidigital number, since it uses as much as digits as its factorization.

1121501440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7047 (or 7033 counting only the distinct ones).

The product of its (nonzero) digits is 160, while the sum is 19.

The square root of 1121501440 is about 33488.8255989965. The cubic root of 1121501440 is about 1038.9626737715.

Adding to 1121501440 its reverse (441051211), we get a palindrome (1562552651).

The spelling of 1121501440 in words is "one billion, one hundred twenty-one million, five hundred one thousand, four hundred forty".