1121315440 has 40 divisors (see below), whose sum is σ = 2979496800. Its totient is φ = 384450816.

The previous prime is 1121315423. The next prime is 1121315513. The reversal of 1121315440 is 445131211.

It is a tau number, because it is divible by the number of its divisors (40).

It is a congruent number.

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, 1000615 + ... + 1001734.

It is an arithmetic number, because the mean of its divisors is an integer number (74487420).

Almost surely, 2^1121315440 is an apocalyptic number.

1121315440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1121315440 is an abundant number, since it is smaller than the sum of its proper divisors (1858181360).

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

1121315440 is a wasteful number, since it uses less digits than its factorization.

1121315440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2002369 (or 2002363 counting only the distinct ones).

The product of its (nonzero) digits is 480, while the sum is 22.

The square root of 1121315440 is about 33486.0484381182. The cubic root of 1121315440 is about 1038.9052335891.

Adding to 1121315440 its reverse (445131211), we get a palindrome (1566446651).

The spelling of 1121315440 in words is "one billion, one hundred twenty-one million, three hundred fifteen thousand, four hundred forty".