1123450100 has 36 divisors (see below), whose sum is σ = 2581295724. Its totient is φ = 422945280.

The previous prime is 1123450099. The next prime is 1123450103. The reversal of 1123450100 is 10543211.

It can be written as a sum of positive squares in 6 ways, for example, as 84419344 + 1039030756 = 9188^2 + 32234^2 .

It is a Harshad number since it is a multiple of its sum of digits (17).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1123450103) 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, 328727 + ... + 332126.

It is an arithmetic number, because the mean of its divisors is an integer number (71702659).

Almost surely, 2^1123450100 is an apocalyptic number.

1123450100 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1123450100 is an abundant number, since it is smaller than the sum of its proper divisors (1457845624).

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

1123450100 is a wasteful number, since it uses less digits than its factorization.

1123450100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 660884 (or 660877 counting only the distinct ones).

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

The square root of 1123450100 is about 33517.9071542362. The cubic root of 1123450100 is about 1039.5640739597.

Adding to 1123450100 its reverse (10543211), we get a palindrome (1133993311).

The spelling of 1123450100 in words is "one billion, one hundred twenty-three million, four hundred fifty thousand, one hundred".