1278141317 has 4 divisors (see below), whose sum is σ = 1290550560. Its totient is φ = 1265732076.

The previous prime is 1278141313. The next prime is 1278141323. The reversal of 1278141317 is 7131418721.

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 1278141317 - 2² = 1278141313 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 (1278141313) 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, 6204467 + ... + 6204672.

It is an arithmetic number, because the mean of its divisors is an integer number (322637640).

Almost surely, 2^1278141317 is an apocalyptic number.

It is an amenable number.

1278141317 is a deficient number, since it is larger than the sum of its proper divisors (12409243).

1278141317 is a wasteful number, since it uses less digits than its factorization.

1278141317 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12409242.

The product of its digits is 9408, while the sum is 35.

The square root of 1278141317 is about 35751.1023186698. The cubic root of 1278141317 is about 1085.2412460224.

The spelling of 1278141317 in words is "one billion, two hundred seventy-eight million, one hundred forty-one thousand, three hundred seventeen".