1123521440 has 48 divisors (see below), whose sum is σ = 2656585512. Its totient is φ = 449025024.

The previous prime is 1123521439. The next prime is 1123521461. The reversal of 1123521440 is 441253211.

It can be written as a sum of positive squares in 4 ways, for example, as 728784016 + 394737424 = 26996^2 + 19868^2 .

It is a super-2 number, since 2×1123521440² = 2524600852279347200, which contains 22 as substring.

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, 253322 + ... + 257718.

Almost surely, 2^1123521440 is an apocalyptic number.

1123521440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1123521440 is an abundant number, since it is smaller than the sum of its proper divisors (1533064072).

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

1123521440 is a wasteful number, since it uses less digits than its factorization.

1123521440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6009 (or 6001 counting only the distinct ones).

The product of its (nonzero) digits is 960, while the sum is 23.

The square root of 1123521440 is about 33518.9713445983. The cubic root of 1123521440 is about 1039.5860778836.

Adding to 1123521440 its reverse (441253211), we get a palindrome (1564774651).

The spelling of 1123521440 in words is "one billion, one hundred twenty-three million, five hundred twenty-one thousand, four hundred forty".