1121542208 has 28 divisors (see below), whose sum is σ = 2279847612. Its totient is φ = 547092480.

The previous prime is 1121542193. The next prime is 1121542229. The reversal of 1121542208 is 8022451211.

It can be written as a sum of positive squares in 2 ways, for example, as 310887424 + 810654784 = 17632^2 + 28472^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 211085 + ... + 216332.

It is an arithmetic number, because the mean of its divisors is an integer number (81423129).

Almost surely, 2^1121542208 is an apocalyptic number.

It is an amenable number.

1121542208 is an abundant number, since it is smaller than the sum of its proper divisors (1158305404).

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

1121542208 is an equidigital number, since it uses as much as digits as its factorization.

1121542208 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 427470 (or 427460 counting only the distinct ones).

The product of its (nonzero) digits is 1280, while the sum is 26.

The square root of 1121542208 is about 33489.4342741110. The cubic root of 1121542208 is about 1038.9752628226.

Adding to 1121542208 its reverse (8022451211), we get a palindrome (9143993419).

The spelling of 1121542208 in words is "one billion, one hundred twenty-one million, five hundred forty-two thousand, two hundred eight".