1121306240 has 64 divisors (see below), whose sum is σ = 2686361760. Its totient is φ = 447562752.

The previous prime is 1121306237. The next prime is 1121306309. The reversal of 1121306240 is 426031211.

It is a tau number, because it is divible by the number of its divisors (64).

It is a Harshad number since it is a multiple of its sum of digits (20).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 348479 + ... + 351681.

Almost surely, 2^1121306240 is an apocalyptic number.

1121306240 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 1121306240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1343180880).

1121306240 is an abundant number, since it is smaller than the sum of its proper divisors (1565055520).

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

1121306240 is an equidigital number, since it uses as much as digits as its factorization.

1121306240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3769 (or 3757 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 20.

The square root of 1121306240 is about 33485.9110671936. The cubic root of 1121306240 is about 1038.9023922970.

Adding to 1121306240 its reverse (426031211), we get a palindrome (1547337451).

The spelling of 1121306240 in words is "one billion, one hundred twenty-one million, three hundred six thousand, two hundred forty".