1273040000 has 80 divisors (see below), whose sum is σ = 3169352670. Its totient is φ = 509184000.

The previous prime is 1273039997. The next prime is 1273040039. The reversal of 1273040000 is 403721.

It is a happy number.

It can be written as a sum of positive squares in 5 ways, for example, as 95726656 + 1177313344 = 9784^2 + 34312^2 .

It is a tau number, because it is divible by the number of its divisors (80).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 72044 + ... + 87956.

Almost surely, 2^1273040000 is an apocalyptic number.

1273040000 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 1273040000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1584676335).

1273040000 is an abundant number, since it is smaller than the sum of its proper divisors (1896312670).

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

1273040000 is an frugal number, since it uses more digits than its factorization.

1273040000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15947 (or 15920 counting only the distinct ones).

The product of its (nonzero) digits is 168, while the sum is 17.

The square root of 1273040000 is about 35679.6860972739. The cubic root of 1273040000 is about 1083.7955161373.

Adding to 1273040000 its reverse (403721), we get a palindrome (1273443721).

The spelling of 1273040000 in words is "one billion, two hundred seventy-three million, forty thousand".