1278251067 has 16 divisors (see below), whose sum is σ = 1804112640. Its totient is φ = 803645472.

The previous prime is 1278251041. The next prime is 1278251069. The reversal of 1278251067 is 7601528721.

It is not a de Polignac number, because 1278251067 - 2⁶ = 1278251003 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1278251069) 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, 167103 + ... + 174584.

It is an arithmetic number, because the mean of its divisors is an integer number (112757040).

Almost surely, 2^1278251067 is an apocalyptic number.

1278251067 is a deficient number, since it is larger than the sum of its proper divisors (525861573).

1278251067 is a wasteful number, since it uses less digits than its factorization.

1278251067 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 341762.

The product of its (nonzero) digits is 47040, while the sum is 39.

The square root of 1278251067 is about 35752.6372034288. The cubic root of 1278251067 is about 1085.2723072246.

Adding to 1278251067 its reverse (7601528721), we get a palindrome (8879779788).

The spelling of 1278251067 in words is "one billion, two hundred seventy-eight million, two hundred fifty-one thousand, sixty-seven".