1123540100 has 36 divisors (see below), whose sum is σ = 2439664164. Its totient is φ = 449124480.

The previous prime is 1123540073. The next prime is 1123540109. The reversal of 1123540100 is 10453211.

It can be written as a sum of positive squares in 6 ways, for example, as 274167364 + 849372736 = 16558^2 + 29144^2 .

It is not an unprimeable number, because it can be changed into a prime (1123540109) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 218762 + ... + 223838.

It is an arithmetic number, because the mean of its divisors is an integer number (67768449).

Almost surely, 2^1123540100 is an apocalyptic number.

1123540100 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1123540100 is an abundant number, since it is smaller than the sum of its proper divisors (1316124064).

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

1123540100 is a wasteful number, since it uses less digits than its factorization.

1123540100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7304 (or 7297 counting only the distinct ones).

The product of its (nonzero) digits is 120, while the sum is 17.

The square root of 1123540100 is about 33519.2496932733. The cubic root of 1123540100 is about 1039.5918331717.

Adding to 1123540100 its reverse (10453211), we get a palindrome (1133993311).

The spelling of 1123540100 in words is "one billion, one hundred twenty-three million, five hundred forty thousand, one hundred".