1280001200 has 30 divisors (see below), whose sum is σ = 3075203844. Its totient is φ = 512000320.

The previous prime is 1280001169. The next prime is 1280001227. The reversal of 1280001200 is 21000821.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1599602 + ... + 1600401.

Almost surely, 2^1280001200 is an apocalyptic number.

1280001200 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1280001200 is an abundant number, since it is smaller than the sum of its proper divisors (1795202644).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1280001200 is a wasteful number, since it uses less digits than its factorization.

1280001200 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3200021 (or 3200010 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 14.

The square root of 1280001200 is about 35777.1044105025. The cubic root of 1280001200 is about 1085.7673859401.

The spelling of 1280001200 in words is "one billion, two hundred eighty million, one thousand, two hundred".