1121546440 has 128 divisors (see below), whose sum is σ = 3214598400. Its totient is φ = 342835200.

The previous prime is 1121546429. The next prime is 1121546467. The reversal of 1121546440 is 446451211.

It is a Harshad number since it is a multiple of its sum of digits (28).

It is a junction number, because it is equal to n+sod(n) for n = 1121546399 and 1121546408.

It is an unprimeable number.

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 31 ways as a sum of consecutive naturals, for example, 84240 + ... + 96640.

It is an arithmetic number, because the mean of its divisors is an integer number (25114050).

Almost surely, 2^1121546440 is an apocalyptic number.

1121546440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1121546440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1607299200).

1121546440 is an abundant number, since it is smaller than the sum of its proper divisors (2093051960).

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

1121546440 is a wasteful number, since it uses less digits than its factorization.

1121546440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12455 (or 12451 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 28.

The square root of 1121546440 is about 33489.4974581584. The cubic root of 1121546440 is about 1038.9765696356.

Adding to 1121546440 its reverse (446451211), we get a palindrome (1567997651).

The spelling of 1121546440 in words is "one billion, one hundred twenty-one million, five hundred forty-six thousand, four hundred forty".