1278434084 has 12 divisors (see below), whose sum is σ = 2243103744. Its totient is φ = 637547304.

The previous prime is 1278434081. The next prime is 1278434111. The reversal of 1278434084 is 4804348721.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (1278434081) 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, 415712 + ... + 418775.

It is an arithmetic number, because the mean of its divisors is an integer number (186925312).

Almost surely, 2^1278434084 is an apocalyptic number.

It is an amenable number.

1278434084 is a deficient number, since it is larger than the sum of its proper divisors (964669660).

1278434084 is a wasteful number, since it uses less digits than its factorization.

1278434084 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 834874 (or 834872 counting only the distinct ones).

The product of its (nonzero) digits is 172032, while the sum is 41.

The square root of 1278434084 is about 35755.1966013334. The cubic root of 1278434084 is about 1085.3241003369.

The spelling of 1278434084 in words is "one billion, two hundred seventy-eight million, four hundred thirty-four thousand, eighty-four".