1280500733 has 2 divisors, whose sum is σ = 1280500734. Its totient is φ = 1280500732.

The previous prime is 1280500729. The next prime is 1280500769. The reversal of 1280500733 is 3370050821.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1276061284 + 4439449 = 35722^2 + 2107^2 .

It is a cyclic number.

It is not a de Polignac number, because 1280500733 - 2² = 1280500729 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 1280500696 and 1280500705.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1280500633) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 640250366 + 640250367.

It is an arithmetic number, because the mean of its divisors is an integer number (640250367).

Almost surely, 2^1280500733 is an apocalyptic number.

It is an amenable number.

1280500733 is a deficient number, since it is larger than the sum of its proper divisors (1).

1280500733 is an equidigital number, since it uses as much as digits as its factorization.

1280500733 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5040, while the sum is 29.

The square root of 1280500733 is about 35784.0849121505. The cubic root of 1280500733 is about 1085.9086113543.

The spelling of 1280500733 in words is "one billion, two hundred eighty million, five hundred thousand, seven hundred thirty-three".