1121245240 has 16 divisors (see below), whose sum is σ = 2522801880. Its totient is φ = 448498080.

The previous prime is 1121245187. The next prime is 1121245247. The reversal of 1121245240 is 425421211.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1121245247) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14015526 + ... + 14015605.

Almost surely, 2^1121245240 is an apocalyptic number.

1121245240 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1121245240 is an abundant number, since it is smaller than the sum of its proper divisors (1401556640).

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

1121245240 is a wasteful number, since it uses less digits than its factorization.

1121245240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28031142 (or 28031138 counting only the distinct ones).

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

The square root of 1121245240 is about 33485.0002239809. Note that the first 3 decimals coincide. The cubic root of 1121245240 is about 1038.8835529015.

Adding to 1121245240 its reverse (425421211), we get a palindrome (1546666451).

The spelling of 1121245240 in words is "one billion, one hundred twenty-one million, two hundred forty-five thousand, two hundred forty".