1000143312 has 120 divisors (see below), whose sum is σ = 3055241952. Its totient is φ = 281030400.

The previous prime is 1000143301. The next prime is 1000143341. The reversal of 1000143312 is 2133410001.

It is a junction number, because it is equal to n+sod(n) for n = 1000143291 and 1000143300.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 139987 + ... + 146957.

Almost surely, 2^1000143312 is an apocalyptic number.

1000143312 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1000143312, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1527620976).

1000143312 is an abundant number, since it is smaller than the sum of its proper divisors (2055098640).

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

1000143312 is a wasteful number, since it uses less digits than its factorization.

1000143312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7057 (or 7044 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 15.

The square root of 1000143312 is about 31625.0424821849. The cubic root of 1000143312 is about 1000.0477683848.

Adding to 1000143312 its reverse (2133410001), we get a palindrome (3133553313).

The spelling of 1000143312 in words is "one billion, one hundred forty-three thousand, three hundred twelve".