1281213284 has 12 divisors (see below), whose sum is σ = 2414594364. Its totient is φ = 591329184.

The previous prime is 1281213277. The next prime is 1281213289. The reversal of 1281213284 is 4823121821.

It can be written as a sum of positive squares in 2 ways, for example, as 293368384 + 987844900 = 17128^2 + 31430^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 1281213284.

It is not an unprimeable number, because it can be changed into a prime (1281213289) 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, 12319307 + ... + 12319410.

It is an arithmetic number, because the mean of its divisors is an integer number (201216197).

Almost surely, 2^1281213284 is an apocalyptic number.

It is an amenable number.

1281213284 is a deficient number, since it is larger than the sum of its proper divisors (1133381080).

1281213284 is a wasteful number, since it uses less digits than its factorization.

1281213284 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24638734 (or 24638732 counting only the distinct ones).

The product of its digits is 6144, while the sum is 32.

The square root of 1281213284 is about 35794.0397831818. The cubic root of 1281213284 is about 1086.1099965800.

The spelling of 1281213284 in words is "one billion, two hundred eighty-one million, two hundred thirteen thousand, two hundred eighty-four".