1280718112 has 12 divisors (see below), whose sum is σ = 2521413846. Its totient is φ = 640359040.

The previous prime is 1280718091. The next prime is 1280718113. The reversal of 1280718112 is 2118170821.

It can be written as a sum of positive squares in only one way, i.e., 1210761616 + 69956496 = 34796^2 + 8364^2 .

It is not an unprimeable number, because it can be changed into a prime (1280718113) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20011189 + ... + 20011252.

Almost surely, 2^1280718112 is an apocalyptic number.

It is an amenable number.

1280718112 is a deficient number, since it is larger than the sum of its proper divisors (1240695734).

1280718112 is an equidigital number, since it uses as much as digits as its factorization.

1280718112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40022451 (or 40022443 counting only the distinct ones).

The product of its (nonzero) digits is 1792, while the sum is 31.

The square root of 1280718112 is about 35787.1221530874. The cubic root of 1280718112 is about 1085.9700561640.

Adding to 1280718112 its reverse (2118170821), we get a palindrome (3398888933).

The spelling of 1280718112 in words is "one billion, two hundred eighty million, seven hundred eighteen thousand, one hundred twelve".