1121164540 has 48 divisors (see below), whose sum is σ = 2481292800. Its totient is φ = 424360512.

The previous prime is 1121164537. The next prime is 1121164549. The reversal of 1121164540 is 454611211.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1121164549) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 548841 + ... + 550879.

It is an arithmetic number, because the mean of its divisors is an integer number (51693600).

Almost surely, 2^1121164540 is an apocalyptic number.

1121164540 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1121164540 is an abundant number, since it is smaller than the sum of its proper divisors (1360128260).

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

1121164540 is a wasteful number, since it uses less digits than its factorization.

1121164540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3514 (or 3512 counting only the distinct ones).

The product of its (nonzero) digits is 960, while the sum is 25.

The square root of 1121164540 is about 33483.7951851340. The cubic root of 1121164540 is about 1038.8586282578.

Adding to 1121164540 its reverse (454611211), we get a palindrome (1575775751).

The spelling of 1121164540 in words is "one billion, one hundred twenty-one million, one hundred sixty-four thousand, five hundred forty".