1278041506 has 32 divisors (see below), whose sum is σ = 2295889920. Its totient is φ = 521694096.

The previous prime is 1278041497. The next prime is 1278041507. The reversal of 1278041506 is 6051408721.

It is not an unprimeable number, because it can be changed into a prime (1278041507) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 68655 + ... + 85261.

It is an arithmetic number, because the mean of its divisors is an integer number (71746560).

Almost surely, 2^1278041506 is an apocalyptic number.

1278041506 is a deficient number, since it is larger than the sum of its proper divisors (1017848414).

1278041506 is a wasteful number, since it uses less digits than its factorization.

1278041506 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16878.

The product of its (nonzero) digits is 13440, while the sum is 34.

The square root of 1278041506 is about 35749.7063764166. The cubic root of 1278041506 is about 1085.2129961901.

The spelling of 1278041506 in words is "one billion, two hundred seventy-eight million, forty-one thousand, five hundred six".