1278463067 has 12 divisors (see below), whose sum is σ = 1488643920. Its totient is φ = 1094755536.

The previous prime is 1278463063. The next prime is 1278463079. The reversal of 1278463067 is 7603648721.

It is not a de Polignac number, because 1278463067 - 2² = 1278463063 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1278463063) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 40178 + ... + 64584.

It is an arithmetic number, because the mean of its divisors is an integer number (124053660).

Almost surely, 2^1278463067 is an apocalyptic number.

1278463067 is a deficient number, since it is larger than the sum of its proper divisors (210180853).

1278463067 is a wasteful number, since it uses less digits than its factorization.

1278463067 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25490 (or 25483 counting only the distinct ones).

The product of its (nonzero) digits is 338688, while the sum is 44.

The square root of 1278463067 is about 35755.6018967658. The cubic root of 1278463067 is about 1085.3323019619.

The spelling of 1278463067 in words is "one billion, two hundred seventy-eight million, four hundred sixty-three thousand, sixty-seven".