1125223668 has 36 divisors (see below), whose sum is σ = 2873647140. Its totient is φ = 371206656.

The previous prime is 1125223667. The next prime is 1125223739. The reversal of 1125223668 is 8663225211.

It can be written as a sum of positive squares in 2 ways, for example, as 430479504 + 694744164 = 20748^2 + 26358^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is a super-2 number, since 2×1125223668² = 2532256606054748448, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1125223667) 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 11 ways as a sum of consecutive naturals, for example, 157623 + ... + 164606.

Almost surely, 2^1125223668 is an apocalyptic number.

1125223668 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

1125223668 is an abundant number, since it is smaller than the sum of its proper divisors (1748423472).

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

1125223668 is a wasteful number, since it uses less digits than its factorization.

1125223668 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 322336 (or 322331 counting only the distinct ones).

The product of its digits is 34560, while the sum is 36.

The square root of 1125223668 is about 33544.3537424706. The cubic root of 1125223668 is about 1040.1108326162.

Adding to 1125223668 its reverse (8663225211), we get a palindrome (9788448879).

The spelling of 1125223668 in words is "one billion, one hundred twenty-five million, two hundred twenty-three thousand, six hundred sixty-eight".