1307121280 has 64 divisors (see below), whose sum is σ = 3260736000. Its totient is φ = 500110336.

The previous prime is 1307121271. The next prime is 1307121307. The reversal of 1307121280 is 821217031.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (64).

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 29680 + ... + 59119.

It is an arithmetic number, because the mean of its divisors is an integer number (50949000).

Almost surely, 2^1307121280 is an apocalyptic number.

1307121280 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1307121280 is an abundant number, since it is smaller than the sum of its proper divisors (1953614720).

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

1307121280 is an equidigital number, since it uses as much as digits as its factorization.

1307121280 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 88841 (or 88829 counting only the distinct ones).

The product of its (nonzero) digits is 672, while the sum is 25.

The square root of 1307121280 is about 36154.1322672803. The cubic root of 1307121280 is about 1093.3821050357.

The spelling of 1307121280 in words is "one billion, three hundred seven million, one hundred twenty-one thousand, two hundred eighty".