1280730743 has 8 divisors (see below), whose sum is σ = 1307826000. Its totient is φ = 1253744128.

The previous prime is 1280730727. The next prime is 1280730749. The reversal of 1280730743 is 3470370821.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1280730743 - 2⁴ = 1280730727 is a prime.

It is a super-3 number, since 3×1280730743³ (a number of 28 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1280730749) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3113 + ... + 50706.

It is an arithmetic number, because the mean of its divisors is an integer number (163478250).

Almost surely, 2^1280730743 is an apocalyptic number.

1280730743 is a deficient number, since it is larger than the sum of its proper divisors (27095257).

1280730743 is an equidigital number, since it uses as much as digits as its factorization.

1280730743 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 54321.

The product of its (nonzero) digits is 28224, while the sum is 35.

The square root of 1280730743 is about 35787.2986267475. The cubic root of 1280730743 is about 1085.9736262555.

The spelling of 1280730743 in words is "one billion, two hundred eighty million, seven hundred thirty thousand, seven hundred forty-three".