1280313523 has 4 divisors (see below), whose sum is σ = 1280956000. Its totient is φ = 1279671048.

The previous prime is 1280313509. The next prime is 1280313563. The reversal of 1280313523 is 3253130821.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1280313523 - 2⁹ = 1280313011 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1280313491 and 1280313500.

It is not an unprimeable number, because it can be changed into a prime (1280313563) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 318240 + ... + 322237.

It is an arithmetic number, because the mean of its divisors is an integer number (320239000).

Almost surely, 2^1280313523 is an apocalyptic number.

1280313523 is a deficient number, since it is larger than the sum of its proper divisors (642477).

1280313523 is an equidigital number, since it uses as much as digits as its factorization.

1280313523 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 642476.

The product of its (nonzero) digits is 4320, while the sum is 28.

The square root of 1280313523 is about 35781.4689888495. The cubic root of 1280313523 is about 1085.8556886046.

The spelling of 1280313523 in words is "one billion, two hundred eighty million, three hundred thirteen thousand, five hundred twenty-three".