1278005323 has 8 divisors (see below), whose sum is σ = 1462549248. Its totient is φ = 1093954344.

The previous prime is 1278005317. The next prime is 1278005347. The reversal of 1278005323 is 3235008721.

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

It is not a de Polignac number, because 1278005323 - 2²⁵ = 1244450891 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1278005353) by changing a digit.

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, 117661 + ... + 128062.

It is an arithmetic number, because the mean of its divisors is an integer number (182818656).

Almost surely, 2^1278005323 is an apocalyptic number.

1278005323 is a deficient number, since it is larger than the sum of its proper divisors (184543925).

1278005323 is an equidigital number, since it uses as much as digits as its factorization.

1278005323 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 246473.

The product of its (nonzero) digits is 10080, while the sum is 31.

The square root of 1278005323 is about 35749.2003127343. The cubic root of 1278005323 is about 1085.2027548345.

The spelling of 1278005323 in words is "one billion, two hundred seventy-eight million, five thousand, three hundred twenty-three".