1299342720 has 128 divisors (see below), whose sum is σ = 4460329440. Its totient is φ = 319832064.

The previous prime is 1299342689. The next prime is 1299342731. The reversal of 1299342720 is 272439921.

It is a tau number, because it is divible by the number of its divisors (128).

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a congruent number.

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 15 ways as a sum of consecutive naturals, for example, 1069 + ... + 50988.

Almost surely, 2^1299342720 is an apocalyptic number.

1299342720 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 1299342720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2230164720).

1299342720 is an abundant number, since it is smaller than the sum of its proper divisors (3160986720).

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

1299342720 is a wasteful number, since it uses less digits than its factorization.

1299342720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 52092 (or 52080 counting only the distinct ones).

The product of its (nonzero) digits is 54432, while the sum is 39.

The square root of 1299342720 is about 36046.3967686092. The cubic root of 1299342720 is about 1091.2089159725.

The spelling of 1299342720 in words is "one billion, two hundred ninety-nine million, three hundred forty-two thousand, seven hundred twenty".