1273320000 has 420 divisors, whose sum is σ = 4765736976. Its totient is φ = 336960000.

The previous prime is 1273319989. The next prime is 1273320001. The reversal of 1273320000 is 233721.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is not an unprimeable number, because it can be changed into a prime (1273320001) 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 59 ways as a sum of consecutive naturals, for example, 9719935 + ... + 9720065.

Almost surely, 2^1273320000 is an apocalyptic number.

1273320000 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 1273320000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2382868488).

1273320000 is an abundant number, since it is smaller than the sum of its proper divisors (3492416976).

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

1273320000 is an frugal number, since it uses more digits than its factorization.

1273320000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 178 (or 141 counting only the distinct ones).

The product of its (nonzero) digits is 252, while the sum is 18.

The square root of 1273320000 is about 35683.6096828782. The cubic root of 1273320000 is about 1083.8749691261.

Adding to 1273320000 its reverse (233721), we get a palindrome (1273553721).

The spelling of 1273320000 in words is "one billion, two hundred seventy-three million, three hundred twenty thousand".