1278310853 has 4 divisors (see below), whose sum is σ = 1282475040. Its totient is φ = 1274146668.

The previous prime is 1278310849. The next prime is 1278310879. The reversal of 1278310853 is 3580138721.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1278310853 - 2² = 1278310849 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1278310883) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2081633 + ... + 2082246.

It is an arithmetic number, because the mean of its divisors is an integer number (320618760).

Almost surely, 2^1278310853 is an apocalyptic number.

It is an amenable number.

1278310853 is a deficient number, since it is larger than the sum of its proper divisors (4164187).

1278310853 is an equidigital number, since it uses as much as digits as its factorization.

1278310853 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4164186.

The product of its (nonzero) digits is 40320, while the sum is 38.

The square root of 1278310853 is about 35753.4732998068. The cubic root of 1278310853 is about 1085.2892269781.

The spelling of 1278310853 in words is "one billion, two hundred seventy-eight million, three hundred ten thousand, eight hundred fifty-three".