1121445400 has 24 divisors (see below), whose sum is σ = 2607361020. Its totient is φ = 448578080.

The previous prime is 1121445389. The next prime is 1121445401. The reversal of 1121445400 is 45441211.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1121445401) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2803414 + ... + 2803813.

Almost surely, 2^1121445400 is an apocalyptic number.

1121445400 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1121445400 is an abundant number, since it is smaller than the sum of its proper divisors (1485915620).

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

1121445400 is a wasteful number, since it uses less digits than its factorization.

1121445400 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5607243 (or 5607234 counting only the distinct ones).

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

The square root of 1121445400 is about 33487.9888915414. The cubic root of 1121445400 is about 1038.9453682689.

Adding to 1121445400 its reverse (45441211), we get a palindrome (1166886611).

The spelling of 1121445400 in words is "one billion, one hundred twenty-one million, four hundred forty-five thousand, four hundred".