1231226600 has 72 divisors (see below), whose sum is σ = 3021371910. Its totient is φ = 466542720.

The previous prime is 1231226561. The next prime is 1231226603. The reversal of 1231226600 is 66221321.

It can be written as a sum of positive squares in 3 ways, for example, as 836250724 + 394975876 = 28918^2 + 19874^2 .

It is not an unprimeable number, because it can be changed into a prime (1231226603) by changing a digit.

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 17 ways as a sum of consecutive naturals, for example, 63674 + ... + 80726.

Almost surely, 2^1231226600 is an apocalyptic number.

1231226600 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 1231226600, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1510685955).

1231226600 is an abundant number, since it is smaller than the sum of its proper divisors (1790145310).

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

1231226600 is a wasteful number, since it uses less digits than its factorization.

1231226600 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17107 (or 17079 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 23.

The square root of 1231226600 is about 35088.8386812673. The cubic root of 1231226600 is about 1071.7973112186.

Adding to 1231226600 its reverse (66221321), we get a palindrome (1297447921).

The spelling of 1231226600 in words is "one billion, two hundred thirty-one million, two hundred twenty-six thousand, six hundred".