1002001312 has 24 divisors (see below), whose sum is σ = 2124436356. Its totient is φ = 462461952.

The previous prime is 1002001289. The next prime is 1002001331. The reversal of 1002001312 is 2131002001.

It can be written as a sum of positive squares in 2 ways, for example, as 990738576 + 11262736 = 31476^2 + 3356^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1203913 + ... + 1204744.

Almost surely, 2^1002001312 is an apocalyptic number.

It is an amenable number.

1002001312 is an abundant number, since it is smaller than the sum of its proper divisors (1122435044).

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

1002001312 is a wasteful number, since it uses less digits than its factorization.

1002001312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2408680 (or 2408672 counting only the distinct ones).

The product of its (nonzero) digits is 12, while the sum is 10.

The square root of 1002001312 is about 31654.4043065100. The cubic root of 1002001312 is about 1000.6666594664. Note that the first 4 decimals are identical.

Adding to 1002001312 its reverse (2131002001), we get a palindrome (3133003313).

The spelling of 1002001312 in words is "one billion, two million, one thousand, three hundred twelve".