100001043 has 12 divisors (see below), whose sum is σ = 144878968. Its totient is φ = 66467520.

The previous prime is 100001029. The next prime is 100001053. The reversal of 100001043 is 340100001.

It is not a de Polignac number, because 100001043 - 2¹² = 99996947 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (100001053) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 13453 + ... + 19518.

Almost surely, 2^100001043 is an apocalyptic number.

100001043 is a deficient number, since it is larger than the sum of its proper divisors (44877925).

100001043 is a wasteful number, since it uses less digits than its factorization.

100001043 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33314 (or 33311 counting only the distinct ones).

The product of its (nonzero) digits is 12, while the sum is 9.

The square root of 100001043 is about 10000.0521498640. The cubic root of 100001043 is about 464.1604970814.

Adding to 100001043 its reverse (340100001), we get a palindrome (440101044).

The spelling of 100001043 in words is "one hundred million, one thousand, forty-three".