1000012143 has 16 divisors (see below), whose sum is σ = 1436490720. Its totient is φ = 615145344.

The previous prime is 1000012121. The next prime is 1000012157. The reversal of 1000012143 is 3412100001.

It is a happy number.

It is not a de Polignac number, because 1000012143 - 2⁹ = 1000011631 is a prime.

It is a super-2 number, since 2×1000012143² = 2000048572294904898, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1000013143) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 162853 + ... + 168881.

It is an arithmetic number, because the mean of its divisors is an integer number (89780670).

Almost surely, 2^1000012143 is an apocalyptic number.

1000012143 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

1000012143 is a deficient number, since it is larger than the sum of its proper divisors (436478577).

1000012143 is a wasteful number, since it uses less digits than its factorization.

1000012143 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10298.

The product of its (nonzero) digits is 24, while the sum is 12.

The square root of 1000012143 is about 31622.9685987891. The cubic root of 1000012143 is about 1000.0040476503.

Adding to 1000012143 its reverse (3412100001), we get a palindrome (4412112144).

The spelling of 1000012143 in words is "one billion, twelve thousand, one hundred forty-three".