1281067264 has 27 divisors (see below), whose sum is σ = 2558273977. Its totient is φ = 640247296.

The previous prime is 1281067261. The next prime is 1281067273. The reversal of 1281067264 is 4627601821.

The square root of 1281067264 is 35792.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 1018886400 + 262180864 = 31920^2 + 16192^2 .

It is a super-2 number, since 2×1281067264² = 3282266669784891392, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1281067261) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 571554 + ... + 573790.

Almost surely, 2^1281067264 is an apocalyptic number.

1281067264 is the 35792-nd square number.

It is an amenable number.

1281067264 is a deficient number, since it is larger than the sum of its proper divisors (1277206713).

1281067264 is an frugal number, since it uses more digits than its factorization.

1281067264 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4490 (or 2239 counting only the distinct ones).

The product of its (nonzero) digits is 32256, while the sum is 37.

The cubic root of 1281067264 is about 1086.0687336591.

The spelling of 1281067264 in words is "one billion, two hundred eighty-one million, sixty-seven thousand, two hundred sixty-four".