1278774854 has 12 divisors (see below), whose sum is σ = 2231331804. Its totient is φ = 548046324.

The previous prime is 1278774839. The next prime is 1278774857. The reversal of 1278774854 is 4584778721.

1278774854 is nontrivially palindromic in base 12.

It is a junction number, because it is equal to n+sod(n) for n = 1278774796 and 1278774805.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1278774857) 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 5 ways as a sum of consecutive naturals, for example, 6524264 + ... + 6524459.

It is an arithmetic number, because the mean of its divisors is an integer number (185944317).

Almost surely, 2^1278774854 is an apocalyptic number.

1278774854 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

1278774854 is a deficient number, since it is larger than the sum of its proper divisors (952556950).

1278774854 is a wasteful number, since it uses less digits than its factorization.

1278774854 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13048739 (or 13048732 counting only the distinct ones).

The product of its digits is 3512320, while the sum is 53.

The square root of 1278774854 is about 35759.9616051248. The cubic root of 1278774854 is about 1085.4205237771.

The spelling of 1278774854 in words is "one billion, two hundred seventy-eight million, seven hundred seventy-four thousand, eight hundred fifty-four".