1278668151 has 12 divisors (see below), whose sum is σ = 1859198640. Its totient is φ = 846799200.

The previous prime is 1278668117. The next prime is 1278668159. The reversal of 1278668151 is 1518668721.

It is not a de Polignac number, because 1278668151 - 2¹⁴ = 1278651767 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1278668097 and 1278668106.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1278668159) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 469086 + ... + 471803.

It is an arithmetic number, because the mean of its divisors is an integer number (154933220).

Almost surely, 2^1278668151 is an apocalyptic number.

1278668151 is a deficient number, since it is larger than the sum of its proper divisors (580530489).

1278668151 is a wasteful number, since it uses less digits than its factorization.

1278668151 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 941046 (or 941043 counting only the distinct ones).

The product of its digits is 161280, while the sum is 45.

The square root of 1278668151 is about 35758.4696400727. The cubic root of 1278668151 is about 1085.3903332013.

The spelling of 1278668151 in words is "one billion, two hundred seventy-eight million, six hundred sixty-eight thousand, one hundred fifty-one".